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인기 있는 삼각법 >

tan(x-45)-tan(x+45)=4

해법

tan (x - 4 5^{\circ}) - tan (x + 4 5^{\circ}) = 4

해법

x = 12 0^{\circ} + 18 0^{\circ} n, x = 6 0^{\circ} + 18 0^{\circ} n

+1

라디안

x = \frac{2 π}{3} + πn, x = \frac{π}{3} + πn

솔루션 단계

tan (x - 4 5^{\circ}) - tan (x + 4 5^{\circ}) = 4

삼각성을 사용하여 다시 쓰기

tan (x - 4 5^{\circ}) - tan (x + 4 5^{\circ}) = 4

삼각성을 사용하여 다시 쓰기

tan (x - 4 5^{\circ})

기본 삼각형 항등식 사용:

tan (x) = \frac{sin ( x )}{cos ( x )}

= \frac{sin ( x - 4 5 ^{\circ} )}{cos ( x - 4 5 ^{\circ} )}

각도 차이 식별 사용:

sin (s - t) = sin (s) cos (t) - cos (s) sin (t)

= \frac{sin ( x ) cos ( 4 5 ^{\circ} ) - cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x - 4 5 ^{\circ} )}

각도 차이 식별 사용:

cos (s - t) = cos (s) cos (t) + sin (s) sin (t)

= \frac{sin ( x ) cos ( 4 5 ^{\circ} ) - cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) + sin ( x ) sin ( 4 5 ^{\circ} )}

\frac{sin ( x ) cos ( 4 5 ^{\circ} ) - cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) + sin ( x ) sin ( 4 5 ^{\circ} )}

단순화하세요:

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )}

\frac{sin ( x ) cos ( 4 5 ^{\circ} ) - cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) + sin ( x ) sin ( 4 5 ^{\circ} )}

sin (x) cos (4 5^{\circ}) - cos (x) sin (4 5^{\circ}) = \frac{2}{2} sin (x) - \frac{2}{2} cos (x)

sin (x) cos (4 5^{\circ}) - cos (x) sin (4 5^{\circ})

cos (4 5^{\circ})

단순화하세요:

\frac{2}{2}

cos (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

cos (4 5^{\circ}) = \frac{2}{2}

cos (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{2}{2}

= \frac{2}{2} sin (x) - sin (4 5^{\circ}) cos (x)

sin (4 5^{\circ})

단순화하세요:

\frac{2}{2}

sin (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

sin (4 5^{\circ}) = \frac{2}{2}

sin (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

= \frac{2}{2} sin (x) - \frac{2}{2} cos (x)

= \frac{\frac{2}{2} sin ( x ) - \frac{2}{2} cos ( x )}{cos ( 4 5 ^{\circ} ) cos ( x ) + sin ( 4 5 ^{\circ} ) sin ( x )}

cos (x) cos (4 5^{\circ}) + sin (x) sin (4 5^{\circ}) = \frac{2}{2} cos (x) + \frac{2}{2} sin (x)

cos (x) cos (4 5^{\circ}) + sin (x) sin (4 5^{\circ})

cos (4 5^{\circ})

단순화하세요:

\frac{2}{2}

cos (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

cos (4 5^{\circ}) = \frac{2}{2}

cos (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{2}{2}

= \frac{2}{2} cos (x) + sin (4 5^{\circ}) sin (x)

sin (4 5^{\circ})

단순화하세요:

\frac{2}{2}

sin (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

sin (4 5^{\circ}) = \frac{2}{2}

sin (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

= \frac{2}{2} cos (x) + \frac{2}{2} sin (x)

= \frac{\frac{2}{2} sin ( x ) - \frac{2}{2} cos ( x )}{\frac{2}{2} cos ( x ) + \frac{2}{2} sin ( x )}

cos (x) \frac{2}{2}

곱하다

: \frac{2 cos ( x )}{2}

cos (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 cos ( x )}{2}

= \frac{\frac{2}{2} sin ( x ) - \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} + \frac{2}{2} sin ( x )}

sin (x) \frac{2}{2}

곱하다

: \frac{2 sin ( x )}{2}

sin (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 sin ( x )}{2}

= \frac{\frac{2}{2} sin ( x ) - \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} + \frac{2 s i n ( x )}{2}}

sin (x) \frac{2}{2}

곱하다

: \frac{2 sin ( x )}{2}

sin (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 sin ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} - \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} + \frac{2 s i n ( x )}{2}}

cos (x) \frac{2}{2}

곱하다

: \frac{2 cos ( x )}{2}

cos (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 cos ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} - \frac{2 c o s ( x )}{2}}{\frac{2 c o s ( x )}{2} + \frac{2 s i n ( x )}{2}}

분수를 합치다

\frac{2 cos ( x )}{2} + \frac{2 sin ( x )}{2} : \frac{2 cos ( x ) + 2 sin ( x )}{2}

규칙 적용

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{2 cos ( x ) + 2 sin ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} - \frac{2 c o s ( x )}{2}}{\frac{2 c o s ( x ) + 2 s i n ( x )}{2}}

분수를 합치다

\frac{2 sin ( x )}{2} - \frac{2 cos ( x )}{2} : \frac{2 sin ( x ) - 2 cos ( x )}{2}

규칙 적용

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{2 sin ( x ) - 2 cos ( x )}{2}

= \frac{\frac{2 s i n ( x ) - 2 c o s ( x )}{2}}{\frac{2 c o s ( x ) + 2 s i n ( x )}{2}}

분수 나누기:

\frac{\frac{a}{b}}{\frac{c}{d}} = \frac{a \cdot d}{b \cdot c}

= \frac{( 2 sin ( x ) - 2 cos ( x ) ) \cdot 2}{2 ( 2 cos ( x ) + 2 sin ( x ) )}

공통 요인 취소:

2

= \frac{2 sin ( x ) - 2 cos ( x )}{2 cos ( x ) + 2 sin ( x )}

공통 용어를 추출하다

2

= \frac{2 ( sin ( x ) - cos ( x ) )}{2 cos ( x ) + 2 sin ( x )}

공통 용어를 추출하다

2

= \frac{2 ( sin ( x ) - cos ( x ) )}{2 ( cos ( x ) + sin ( x ) )}

공통 요인 취소:

2

= \frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )}

= \frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )}

기본 삼각형 항등식 사용:

tan (x) = \frac{sin ( x )}{cos ( x )}

= \frac{sin ( x + 4 5 ^{\circ} )}{cos ( x + 4 5 ^{\circ} )}

앵글섬식별사용:

sin (s + t) = sin (s) cos (t) + cos (s) sin (t)

= \frac{sin ( x ) cos ( 4 5 ^{\circ} ) + cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x + 4 5 ^{\circ} )}

앵글섬식별사용:

cos (s + t) = cos (s) cos (t) - sin (s) sin (t)

= \frac{sin ( x ) cos ( 4 5 ^{\circ} ) + cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) - sin ( x ) sin ( 4 5 ^{\circ} )}

\frac{sin ( x ) cos ( 4 5 ^{\circ} ) + cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) - sin ( x ) sin ( 4 5 ^{\circ} )}

단순화하세요:

\frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )}

\frac{sin ( x ) cos ( 4 5 ^{\circ} ) + cos ( x ) sin ( 4 5 ^{\circ} )}{cos ( x ) cos ( 4 5 ^{\circ} ) - sin ( x ) sin ( 4 5 ^{\circ} )}

sin (x) cos (4 5^{\circ}) + cos (x) sin (4 5^{\circ}) = \frac{2}{2} sin (x) + \frac{2}{2} cos (x)

sin (x) cos (4 5^{\circ}) + cos (x) sin (4 5^{\circ})

cos (4 5^{\circ})

단순화하세요:

\frac{2}{2}

cos (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

cos (4 5^{\circ}) = \frac{2}{2}

cos (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{2}{2}

= \frac{2}{2} sin (x) + sin (4 5^{\circ}) cos (x)

sin (4 5^{\circ})

단순화하세요:

\frac{2}{2}

sin (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

sin (4 5^{\circ}) = \frac{2}{2}

sin (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

= \frac{2}{2} sin (x) + \frac{2}{2} cos (x)

= \frac{\frac{2}{2} sin ( x ) + \frac{2}{2} cos ( x )}{cos ( 4 5 ^{\circ} ) cos ( x ) - sin ( 4 5 ^{\circ} ) sin ( x )}

cos (x) cos (4 5^{\circ}) - sin (x) sin (4 5^{\circ}) = \frac{2}{2} cos (x) - \frac{2}{2} sin (x)

cos (x) cos (4 5^{\circ}) - sin (x) sin (4 5^{\circ})

cos (4 5^{\circ})

단순화하세요:

\frac{2}{2}

cos (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

cos (4 5^{\circ}) = \frac{2}{2}

cos (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{2}{2}

= \frac{2}{2} cos (x) - sin (4 5^{\circ}) sin (x)

sin (4 5^{\circ})

단순화하세요:

\frac{2}{2}

sin (4 5^{\circ})

다음과 같은 사소한 아이덴티티 사용:

sin (4 5^{\circ}) = \frac{2}{2}

sin (x)

주기율표

36 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

= \frac{2}{2} cos (x) - \frac{2}{2} sin (x)

= \frac{\frac{2}{2} sin ( x ) + \frac{2}{2} cos ( x )}{\frac{2}{2} cos ( x ) - \frac{2}{2} sin ( x )}

cos (x) \frac{2}{2}

곱하다

: \frac{2 cos ( x )}{2}

cos (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 cos ( x )}{2}

= \frac{\frac{2}{2} sin ( x ) + \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} - \frac{2}{2} sin ( x )}

sin (x) \frac{2}{2}

곱하다

: \frac{2 sin ( x )}{2}

sin (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 sin ( x )}{2}

= \frac{\frac{2}{2} sin ( x ) + \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} - \frac{2 s i n ( x )}{2}}

sin (x) \frac{2}{2}

곱하다

: \frac{2 sin ( x )}{2}

sin (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 sin ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} + \frac{2}{2} cos ( x )}{\frac{2 c o s ( x )}{2} - \frac{2 s i n ( x )}{2}}

cos (x) \frac{2}{2}

곱하다

: \frac{2 cos ( x )}{2}

cos (x) \frac{2}{2}

다중 분수:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 cos ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} + \frac{2 c o s ( x )}{2}}{\frac{2 c o s ( x )}{2} - \frac{2 s i n ( x )}{2}}

분수를 합치다

\frac{2 cos ( x )}{2} - \frac{2 sin ( x )}{2} : \frac{2 cos ( x ) - 2 sin ( x )}{2}

규칙 적용

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{2 cos ( x ) - 2 sin ( x )}{2}

= \frac{\frac{2 s i n ( x )}{2} + \frac{2 c o s ( x )}{2}}{\frac{2 c o s ( x ) - 2 s i n ( x )}{2}}

분수를 합치다

\frac{2 sin ( x )}{2} + \frac{2 cos ( x )}{2} : \frac{2 sin ( x ) + 2 cos ( x )}{2}

규칙 적용

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{2 sin ( x ) + 2 cos ( x )}{2}

= \frac{\frac{2 s i n ( x ) + 2 c o s ( x )}{2}}{\frac{2 c o s ( x ) - 2 s i n ( x )}{2}}

분수 나누기:

\frac{\frac{a}{b}}{\frac{c}{d}} = \frac{a \cdot d}{b \cdot c}

= \frac{( 2 sin ( x ) + 2 cos ( x ) ) \cdot 2}{2 ( 2 cos ( x ) - 2 sin ( x ) )}

공통 요인 취소:

2

= \frac{2 sin ( x ) + 2 cos ( x )}{2 cos ( x ) - 2 sin ( x )}

공통 용어를 추출하다

2

= \frac{2 ( sin ( x ) + cos ( x ) )}{2 cos ( x ) - 2 sin ( x )}

공통 용어를 추출하다

2

= \frac{2 ( sin ( x ) + cos ( x ) )}{2 ( cos ( x ) - sin ( x ) )}

공통 요인 취소:

2

= \frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )}

= \frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )}

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )} - \frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )} = 4

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )} - \frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )}

단순화하세요:

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )} - \frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )}

cos (x) + sin (x), cos (x) - sin (x)

의 최소 공배수:

(cos (x) + sin (x)) (cos (x) - sin (x))

cos (x) + sin (x), cos (x) - sin (x)

최저공통승수 (LCM)

다음 중 하나에 나타나는 요인으로 구성된 식을 계산합니다

cos (x) + sin (x)

혹은

cos (x) - sin (x)

= (cos (x) + sin (x)) (cos (x) - sin (x))

LCM을 기준으로 분수 조정

각 분자를 곱하는 데 필요한 동일한 양으로 곱하시오

해당 분모를 LCM으로 변환합니다

(cos (x) + sin (x)) (cos (x) - sin (x))

위해서

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )} :

분모와 분자를 곱하다

cos (x) - sin (x)

\frac{sin ( x ) - cos ( x )}{cos ( x ) + sin ( x )} = \frac{( sin ( x ) - cos ( x ) ) ( cos ( x ) - sin ( x ) )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

위해서

\frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )} :

분모와 분자를 곱하다

cos (x) + sin (x)

\frac{sin ( x ) + cos ( x )}{cos ( x ) - sin ( x )} = \frac{( sin ( x ) + cos ( x ) ) ( cos ( x ) + sin ( x ) )}{( cos ( x ) - sin ( x ) ) ( cos ( x ) + sin ( x ) )} = \frac{( sin ( x ) + cos ( x ) ) ^{2}}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

= \frac{( sin ( x ) - cos ( x ) ) ( cos ( x ) - sin ( x ) )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} - \frac{( sin ( x ) + cos ( x ) ) ^{2}}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

분모가 같기 때문에, 분수를 합친다:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{( sin ( x ) - cos ( x ) ) ( cos ( x ) - sin ( x ) ) - ( sin ( x ) + cos ( x ) ) ^{2}}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

(sin (x) - cos (x)) (cos (x) - sin (x)) - (sin (x) + cos (x))^{2}

확대한다:

- 2 sin^{2} (x) - 2 cos^{2} (x)

(sin (x) - cos (x)) (cos (x) - sin (x)) - (sin (x) + cos (x))^{2}

(sin (x) + cos (x))^{2} : sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x)

완벽한 정사각형 공식 적용:

(a + b)^{2} = a^{2} + 2 ab + b^{2}

a = sin (x), b = cos (x)

= sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x)

= (sin (x) - cos (x)) (cos (x) - sin (x)) - (sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x))

(sin (x) - cos (x)) (cos (x) - sin (x))

확대한다:

2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x)

(sin (x) - cos (x)) (cos (x) - sin (x))

호일 방법 적용:

(a + b) (c + d) = a c + a d + b c + b d

a = sin (x), b = - cos (x), c = cos (x), d = - sin (x)

= sin (x) cos (x) + sin (x) (- sin (x)) + (- cos (x)) cos (x) + (- cos (x)) (- sin (x))

마이너스 플러스 규칙 적용

+ (- a) = - a, (- a) (- b) = ab

= sin (x) cos (x) - sin (x) sin (x) - cos (x) cos (x) + cos (x) sin (x)

sin (x) cos (x) - sin (x) sin (x) - cos (x) cos (x) + cos (x) sin (x)

단순화하세요:

2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x)

sin (x) cos (x) - sin (x) sin (x) - cos (x) cos (x) + cos (x) sin (x)

유사 요소 추가:

sin (x) cos (x) + cos (x) sin (x) = 2 cos (x) sin (x)

= 2 cos (x) sin (x) - sin (x) sin (x) - cos (x) cos (x)

sin (x) sin (x) = sin^{2} (x)

sin (x) sin (x)

지수 규칙 적용:

a^{b} \cdot a^{c} = a^{b + c}

sin (x) sin (x) = sin^{1 + 1} (x)

= sin^{1 + 1} (x)

숫자 추가:

1 + 1 = 2

= sin^{2} (x)

cos (x) cos (x) = cos^{2} (x)

cos (x) cos (x)

지수 규칙 적용:

a^{b} \cdot a^{c} = a^{b + c}

cos (x) cos (x) = cos^{1 + 1} (x)

= cos^{1 + 1} (x)

숫자 추가:

1 + 1 = 2

= cos^{2} (x)

= 2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x)

= 2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x)

= 2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x) - (sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x))

- (sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x)) : - sin^{2} (x) - 2 sin (x) cos (x) - cos^{2} (x)

- (sin^{2} (x) + 2 sin (x) cos (x) + cos^{2} (x))

괄호 배포

= - (sin^{2} (x)) - (2 sin (x) cos (x)) - (cos^{2} (x))

마이너스 플러스 규칙 적용

+ (- a) = - a

= - sin^{2} (x) - 2 sin (x) cos (x) - cos^{2} (x)

= 2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x) - sin^{2} (x) - 2 sin (x) cos (x) - cos^{2} (x)

2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x) - sin^{2} (x) - 2 sin (x) cos (x) - cos^{2} (x)

단순화하세요:

- 2 sin^{2} (x) - 2 cos^{2} (x)

2 cos (x) sin (x) - sin^{2} (x) - cos^{2} (x) - sin^{2} (x) - 2 sin (x) cos (x) - cos^{2} (x)

유사 요소 추가:

2 cos (x) sin (x) - 2 sin (x) cos (x) = 0

= - sin^{2} (x) - cos^{2} (x) - sin^{2} (x) - cos^{2} (x)

유사 요소 추가:

- cos^{2} (x) - cos^{2} (x) = - 2 cos^{2} (x)

= - sin^{2} (x) - 2 cos^{2} (x) - sin^{2} (x)

유사 요소 추가:

- sin^{2} (x) - sin^{2} (x) = - 2 sin^{2} (x)

= - 2 sin^{2} (x) - 2 cos^{2} (x)

= - 2 sin^{2} (x) - 2 cos^{2} (x)

= \frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} = 4

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} = 4

빼다

4

양쪽에서

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} - 4 = 0

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} - 4

단순화하세요:

\frac{2 sin ^{2} ( x ) - 6 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

\frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} - 4

요소를 분수로 변환:

4 = \frac{4 ( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

= \frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} - \frac{4 ( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

분모가 같기 때문에, 분수를 합친다:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{- 2 sin ^{2} ( x ) - 2 cos ^{2} ( x ) - 4 ( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

- 2 sin^{2} (x) - 2 cos^{2} (x) - 4 (cos (x) + sin (x)) (cos (x) - sin (x))

확대한다:

2 sin^{2} (x) - 6 cos^{2} (x)

- 2 sin^{2} (x) - 2 cos^{2} (x) - 4 (cos (x) + sin (x)) (cos (x) - sin (x))

- 4 (cos (x) + sin (x)) (cos (x) - sin (x))

확대한다:

- 4 cos^{2} (x) + 4 sin^{2} (x)

(cos (x) + sin (x)) (cos (x) - sin (x))

확대한다:

cos^{2} (x) - sin^{2} (x)

(cos (x) + sin (x)) (cos (x) - sin (x))

두 제곱 공식의 차이 적용:

(a + b) (a - b) = a^{2} - b^{2}

a = cos (x), b = sin (x)

= cos^{2} (x) - sin^{2} (x)

= - 4 (cos^{2} (x) - sin^{2} (x))

- 4 (cos^{2} (x) - sin^{2} (x))

확대한다:

- 4 cos^{2} (x) + 4 sin^{2} (x)

- 4 (cos^{2} (x) - sin^{2} (x))

분배 법칙 적용:

a (b - c) = ab - a c

a = - 4, b = cos^{2} (x), c = sin^{2} (x)

= - 4 cos^{2} (x) - (- 4) sin^{2} (x)

마이너스 플러스 규칙 적용

- (- a) = a

= - 4 cos^{2} (x) + 4 sin^{2} (x)

= - 4 cos^{2} (x) + 4 sin^{2} (x)

= - 2 sin^{2} (x) - 2 cos^{2} (x) - 4 cos^{2} (x) + 4 sin^{2} (x)

- 2 sin^{2} (x) - 2 cos^{2} (x) - 4 cos^{2} (x) + 4 sin^{2} (x)

단순화하세요:

2 sin^{2} (x) - 6 cos^{2} (x)

- 2 sin^{2} (x) - 2 cos^{2} (x) - 4 cos^{2} (x) + 4 sin^{2} (x)

유사 요소 추가:

- 2 cos^{2} (x) - 4 cos^{2} (x) = - 6 cos^{2} (x)

= - 2 sin^{2} (x) - 6 cos^{2} (x) + 4 sin^{2} (x)

유사 요소 추가:

- 2 sin^{2} (x) + 4 sin^{2} (x) = 2 sin^{2} (x)

= 2 sin^{2} (x) - 6 cos^{2} (x)

= 2 sin^{2} (x) - 6 cos^{2} (x)

= \frac{2 sin ^{2} ( x ) - 6 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )}

\frac{2 sin ^{2} ( x ) - 6 cos ^{2} ( x )}{( cos ( x ) + sin ( x ) ) ( cos ( x ) - sin ( x ) )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

2 sin^{2} (x) - 6 cos^{2} (x) = 0

2 sin^{2} (x) - 6 cos^{2} (x)

요인:

2 (sin (x) + 3 cos (x)) (sin (x) - 3 cos (x))

2 sin^{2} (x) - 6 cos^{2} (x)

- 63 \cdot 2

로 다시 씁니다

= 2 sin^{2} (x) + 3 \cdot 2 cos^{2} (x)

공통 용어를 추출하다

2

= 2 (sin^{2} (x) - 3 cos^{2} (x))

sin^{2} (x) - 3 cos^{2} (x)

요인:

(sin (x) + 3 cos (x)) (sin (x) - 3 cos (x))

sin^{2} (x) - 3 cos^{2} (x)

sin^{2} (x) - 3 cos^{2} (x) sin^{2} (x) - (3 cos (x))^{2}

로 다시 씁니다

sin^{2} (x) - 3 cos^{2} (x)

급진적인 규칙 적용:

a = (a)^{2}

3 = (3)^{2}

= sin^{2} (x) - (3)^{2} cos^{2} (x)

지수 규칙 적용:

a^{m} b^{m} = (ab)^{m}

(3)^{2} cos^{2} (x) = (3 cos (x))^{2}

= sin^{2} (x) - (3 cos (x))^{2}

= sin^{2} (x) - (3 cos (x))^{2}

두 제곱 공식의 차이 적용:

x^{2} - y^{2} = (x + y) (x - y)

sin^{2} (x) - (3 cos (x))^{2} = (sin (x) + 3 cos (x)) (sin (x) - 3 cos (x))

= (sin (x) + 3 cos (x)) (sin (x) - 3 cos (x))

= 2 (sin (x) + 3 cos (x)) (sin (x) - 3 cos (x))

2 (sin (x) + 3 cos (x)) (sin (x) - 3 cos (x)) = 0

각 부분을 개별적으로 해결

sin (x) + 3 cos (x) = 0 or sin (x) - 3 cos (x) = 0

sin (x) + 3 cos (x) = 0 : x = 12 0^{\circ} + 18 0^{\circ} n

sin (x) + 3 cos (x) = 0

삼각성을 사용하여 다시 쓰기

sin (x) + 3 cos (x) = 0

cos (x), cos (x) \neq = 0

양쪽을 다음으로 나눕니다

\frac{sin ( x ) + 3 cos ( x )}{cos ( x )} = \frac{0}{cos ( x )}

단순화

\frac{sin ( x )}{cos ( x )} + 3 = 0

기본 삼각형 항등식 사용:

\frac{sin ( x )}{cos ( x )} = tan (x)

tan (x) + 3 = 0

tan (x) + 3 = 0

3

를 오른쪽으로 이동

tan (x) + 3 = 0

빼다

3

양쪽에서

tan (x) + 3 - 3 = 0 - 3

단순화

tan (x) = - 3

tan (x) = - 3

일반 솔루션

tan (x) = - 3

tan (x)

주기율표

18 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

x = 12 0^{\circ} + 18 0^{\circ} n

x = 12 0^{\circ} + 18 0^{\circ} n

sin (x) - 3 cos (x) = 0 : x = 6 0^{\circ} + 18 0^{\circ} n

sin (x) - 3 cos (x) = 0

삼각성을 사용하여 다시 쓰기

sin (x) - 3 cos (x) = 0

cos (x), cos (x) \neq = 0

양쪽을 다음으로 나눕니다

\frac{sin ( x ) - 3 cos ( x )}{cos ( x )} = \frac{0}{cos ( x )}

단순화

\frac{sin ( x )}{cos ( x )} - 3 = 0

기본 삼각형 항등식 사용:

\frac{sin ( x )}{cos ( x )} = tan (x)

tan (x) - 3 = 0

tan (x) - 3 = 0

3

를 오른쪽으로 이동

tan (x) - 3 = 0

더하다

3

양쪽으로

tan (x) - 3 + 3 = 0 + 3

단순화

tan (x) = 3

tan (x) = 3

일반 솔루션

tan (x) = 3

tan (x)

주기율표

18 0^{\circ} n

주기:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

x = 6 0^{\circ} + 18 0^{\circ} n

x = 6 0^{\circ} + 18 0^{\circ} n

모든 솔루션 결합

x = 12 0^{\circ} + 18 0^{\circ} n, x = 6 0^{\circ} + 18 0^{\circ} n

그래프

인기 있는 예

sin(2x)=10cos(x)

sin (2 x) = 10 cos (x)

3-4sin(θ)=4-6sin(θ)

3 - 4 sin (θ) = 4 - 6 sin (θ)

tan (x) = - 1.036

tan (2 x) = \frac{24}{7}

solvefor x,80=75-60cos(([pi*x])/(15))

so l v e f or x, 80 = 75 - 60 cos (\frac{[ π \cdot x ]}{15})