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人気のある三角関数 >

1/(cot(x))-(sec(x))/(csc(x))=cos(x)

解

\frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} = cos (x)

解

以下の解はない : x \in R

解答ステップ

\frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} = cos (x)

両辺から

cos (x)

を引く

\frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} - cos (x) = 0

簡素化

\frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} - cos (x) : \frac{csc ( x ) - sec ( x ) cot ( x ) - cos ( x ) cot ( x ) csc ( x )}{cot ( x ) csc ( x )}

\frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} - cos (x)

元を分数に変換する:

cos (x) = \frac{cos ( x )}{1}

= \frac{1}{cot ( x )} - \frac{sec ( x )}{csc ( x )} - \frac{cos ( x )}{1}

以下の最小公倍数:

cot (x), csc (x), 1 : cot (x) csc (x)

cot (x), csc (x), 1

最小公倍数 (LCM)

因数分解された式の 1 つ以上に合わられる因数で構成された式を計算する

= cot (x) csc (x)

LCMに基づいて分数を調整する

該当する分母を乗じてLCMに変えるために

必要な量で各分子を乗じる

cot (x) csc (x)

\frac{1}{cot ( x )}

の場合

:

分母と分子に以下を乗じる:

csc (x)

\frac{1}{cot ( x )} = \frac{1 \cdot csc ( x )}{cot ( x ) csc ( x )} = \frac{csc ( x )}{cot ( x ) csc ( x )}

\frac{sec ( x )}{csc ( x )}

の場合

:

分母と分子に以下を乗じる:

cot (x)

\frac{sec ( x )}{csc ( x )} = \frac{sec ( x ) cot ( x )}{csc ( x ) cot ( x )}

\frac{cos ( x )}{1}

の場合

:

分母と分子に以下を乗じる:

cot (x) csc (x)

\frac{cos ( x )}{1} = \frac{cos ( x ) cot ( x ) csc ( x )}{1 \cdot cot ( x ) csc ( x )} = \frac{cos ( x ) cot ( x ) csc ( x )}{cot ( x ) csc ( x )}

= \frac{csc ( x )}{cot ( x ) csc ( x )} - \frac{sec ( x ) cot ( x )}{csc ( x ) cot ( x )} - \frac{cos ( x ) cot ( x ) csc ( x )}{cot ( x ) csc ( x )}

分母が等しいので, 分数を組み合わせる:

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

= \frac{csc ( x ) - sec ( x ) cot ( x ) - cos ( x ) cot ( x ) csc ( x )}{cot ( x ) csc ( x )}

\frac{csc ( x ) - sec ( x ) cot ( x ) - cos ( x ) cot ( x ) csc ( x )}{cot ( x ) csc ( x )} = 0

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

csc (x) - sec (x) cot (x) - cos (x) cot (x) csc (x) = 0

サイン, コサインで表わす

csc (x) - cot (x) sec (x) - cos (x) cot (x) csc (x)

基本的な三角関数の公式を使用する:

csc (x) = \frac{1}{sin ( x )}

= \frac{1}{sin ( x )} - cot (x) sec (x) - cos (x) cot (x) \frac{1}{sin ( x )}

基本的な三角関数の公式を使用する:

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

= \frac{1}{sin ( x )} - \frac{cos ( x )}{sin ( x )} sec (x) - cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )}

基本的な三角関数の公式を使用する:

sec (x) = \frac{1}{cos ( x )}

= \frac{1}{sin ( x )} - \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{cos ( x )} - cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )}

簡素化

\frac{1}{sin ( x )} - \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{cos ( x )} - cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )} : - \frac{cos ^{2} ( x )}{sin ^{2} ( x )}

\frac{1}{sin ( x )} - \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{cos ( x )} - cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )}

\frac{cos ( x )}{sin ( x )} \cdot \frac{1}{cos ( x )} = \frac{1}{sin ( x )}

\frac{cos ( x )}{sin ( x )} \cdot \frac{1}{cos ( x )}

分数を乗じる:

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

= \frac{cos ( x ) \cdot 1}{sin ( x ) cos ( x )}

共通因数を約分する:

cos (x)

= \frac{1}{sin ( x )}

cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )} = \frac{cos ^{2} ( x )}{sin ^{2} ( x )}

cos (x) \frac{cos ( x )}{sin ( x )} \cdot \frac{1}{sin ( x )}

分数を乗じる:

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

= \frac{cos ( x ) \cdot 1 \cdot cos ( x )}{sin ( x ) sin ( x )}

cos (x) \cdot 1 \cdot cos (x) = cos^{2} (x)

cos (x) \cdot 1 \cdot cos (x)

指数の規則を適用する:

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

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

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

改良

= cos^{2} (x)

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

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

sin (x) sin (x)

指数の規則を適用する:

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

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

= sin^{1 + 1} (x)

数を足す:

1 + 1 = 2

= sin^{2} (x)

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

= \frac{1}{sin ( x )} - \frac{1}{sin ( x )} - \frac{cos ^{2} ( x )}{sin ^{2} ( x )}

類似した元を足す:

1 \cdot \frac{1}{sin ( x )} - 1 \cdot \frac{1}{sin ( x )} = 0

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

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

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

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

- cos^{2} (x) = 0

以下で両辺を割る

- 1

- cos^{2} (x) = 0

以下で両辺を割る

- 1

- cos^{2} (x) = 0

以下で両辺を割る

- 1

\frac{- cos ^{2} ( x )}{- 1} = \frac{0}{- 1}

簡素化

cos^{2} (x) = 0

cos^{2} (x) = 0

規則を適用

x^{n} = 0 \Rightarrow x = 0

cos (x) = 0

以下の一般解

cos (x) = 0

cos (x)

2 πn

循環を含む周期性テーブル:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

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

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

equationは以下で未定義のため:

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

以下の解はない : x \in R

グラフ

人気の例

sin(x)=1,2pi<= x<= 4pi

sin (x) = 1, 2 π \leq x \leq 4 π

cos (a) = 1

-cos(x)+1=2sin^2(x)

- cos (x) + 1 = 2 sin^{2} (x)

sec (θ) = \frac{7}{5}

(sin(x))/(cos(x))=0

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