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受欢迎的三角函数 >

sqrt(2)sin(x/2+pi/6)=1,x<4pi,0

解答

2 sin (\frac{x}{2} + \frac{π}{6}) = 1, x < 4 π, 0

解答

x = \frac{π}{6}, x = \frac{7 π}{6}, x = - \frac{23 π}{6}, x = - \frac{17 π}{6}, x = - \frac{47 π}{6}, x = - \frac{41 π}{6}, x = - \frac{71 π}{6}, x = - \frac{65 π}{6}, x = - \frac{95 π}{6}, x = - \frac{89 π}{6}

+1

度数

x = 3 0^{\circ}, x = 21 0^{\circ}, x = - 69 0^{\circ}, x = - 51 0^{\circ}, x = - 141 0^{\circ}, x = - 123 0^{\circ}, x = - 213 0^{\circ}, x = - 195 0^{\circ}, x = - 285 0^{\circ}, x = - 267 0^{\circ}

求解步骤

2 sin (\frac{x}{2} + \frac{π}{6}) = 1, x < 4 π, 0

两边除以

2

2 sin (\frac{x}{2} + \frac{π}{6}) = 1

两边除以

2

\frac{2 sin ( \frac{x}{2} + \frac{π}{6} )}{2} = \frac{1}{2}

化简

\frac{2 sin ( \frac{x}{2} + \frac{π}{6} )}{2} = \frac{1}{2}

化简

\frac{2 sin ( \frac{x}{2} + \frac{π}{6} )}{2} : sin (\frac{x}{2} + \frac{π}{6})

\frac{2 sin ( \frac{x}{2} + \frac{π}{6} )}{2}

约分:

2

= sin (\frac{x}{2} + \frac{π}{6})

化简

\frac{1}{2} : \frac{2}{2}

\frac{1}{2}

乘以共轭根式

\frac{2}{2}

= \frac{1 \cdot 2}{2 2}

1 \cdot 2 = 2

22 = 2

22

使用根式运算法则:

a a = a

22 = 2

= 2

= \frac{2}{2}

sin (\frac{x}{2} + \frac{π}{6}) = \frac{2}{2}

sin (\frac{x}{2} + \frac{π}{6}) = \frac{2}{2}

sin (\frac{x}{2} + \frac{π}{6}) = \frac{2}{2}

sin (\frac{x}{2} + \frac{π}{6}) = \frac{2}{2}

的通解

sin (x)

周期表（周期为

2 πn

"）：

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} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{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} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

\frac{x}{2} + \frac{π}{6} = \frac{π}{4} + 2 πn, \frac{x}{2} + \frac{π}{6} = \frac{3 π}{4} + 2 πn

\frac{x}{2} + \frac{π}{6} = \frac{π}{4} + 2 πn, \frac{x}{2} + \frac{π}{6} = \frac{3 π}{4} + 2 πn

解

\frac{x}{2} + \frac{π}{6} = \frac{π}{4} + 2 πn : x = 4 πn + \frac{π}{6}

\frac{x}{2} + \frac{π}{6} = \frac{π}{4} + 2 πn

将

\frac{π}{6}

到右边

\frac{x}{2} + \frac{π}{6} = \frac{π}{4} + 2 πn

两边减去

\frac{π}{6}

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} = \frac{π}{4} + 2 πn - \frac{π}{6}

化简

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} = \frac{π}{4} + 2 πn - \frac{π}{6}

化简

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} : \frac{x}{2}

\frac{x}{2} + \frac{π}{6} - \frac{π}{6}

同类项相加:

\frac{π}{6} - \frac{π}{6} = 0

= \frac{x}{2}

化简

\frac{π}{4} + 2 πn - \frac{π}{6} : 2 πn + \frac{π}{12}

\frac{π}{4} + 2 πn - \frac{π}{6}

对同类项分组

= 2 πn + \frac{π}{4} - \frac{π}{6}

4, 6

的最小公倍数:

12

4, 6

最小公倍数 (LCM)

4

质因数分解:

2 \cdot 2

4

4

除以

24 = 2 \cdot 2

= 2 \cdot 2

6

质因数分解:

2 \cdot 3

6

6

除以

26 = 3 \cdot 2

= 2 \cdot 3

2, 3

都是质数，因此无法进一步因数分解

= 2 \cdot 3

将每个因子乘以它在

4

或

6

中出现的最多次数

= 2 \cdot 2 \cdot 3

数字相乘:

2 \cdot 2 \cdot 3 = 12

= 12

根据最小公倍数调整分式

将每个分子乘以其分母转变为最小公倍数所要乘以的同一数值

12

对于

\frac{π}{4} :

将分母和分子乘以

3

\frac{π}{4} = \frac{π 3}{4 \cdot 3} = \frac{π 3}{12}

对于

\frac{π}{6} :

将分母和分子乘以

2

\frac{π}{6} = \frac{π 2}{6 \cdot 2} = \frac{π 2}{12}

= \frac{π 3}{12} - \frac{π 2}{12}

因为分母相等，所以合并分式:

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

= \frac{π 3 - π 2}{12}

同类项相加:

3 π - 2 π = π

= 2 πn + \frac{π}{12}

\frac{x}{2} = 2 πn + \frac{π}{12}

\frac{x}{2} = 2 πn + \frac{π}{12}

\frac{x}{2} = 2 πn + \frac{π}{12}

在两边乘以

2

\frac{x}{2} = 2 πn + \frac{π}{12}

在两边乘以

2

\frac{2 x}{2} = 2 \cdot 2 πn + 2 \cdot \frac{π}{12}

化简

\frac{2 x}{2} = 2 \cdot 2 πn + 2 \cdot \frac{π}{12}

化简

\frac{2 x}{2} : x

\frac{2 x}{2}

数字相除:

\frac{2}{2} = 1

= x

化简

2 \cdot 2 πn + 2 \cdot \frac{π}{12} : 4 πn + \frac{π}{6}

2 \cdot 2 πn + 2 \cdot \frac{π}{12}

2 \cdot 2 πn = 4 πn

2 \cdot 2 πn

数字相乘:

2 \cdot 2 = 4

= 4 πn

2 \cdot \frac{π}{12} = \frac{π}{6}

2 \cdot \frac{π}{12}

分式相乘:

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

= \frac{π 2}{12}

约分:

2

= \frac{π}{6}

= 4 πn + \frac{π}{6}

x = 4 πn + \frac{π}{6}

x = 4 πn + \frac{π}{6}

x = 4 πn + \frac{π}{6}

解

\frac{x}{2} + \frac{π}{6} = \frac{3 π}{4} + 2 πn : x = 4 πn + \frac{7 π}{6}

\frac{x}{2} + \frac{π}{6} = \frac{3 π}{4} + 2 πn

将

\frac{π}{6}

到右边

\frac{x}{2} + \frac{π}{6} = \frac{3 π}{4} + 2 πn

两边减去

\frac{π}{6}

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} = \frac{3 π}{4} + 2 πn - \frac{π}{6}

化简

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} = \frac{3 π}{4} + 2 πn - \frac{π}{6}

化简

\frac{x}{2} + \frac{π}{6} - \frac{π}{6} : \frac{x}{2}

\frac{x}{2} + \frac{π}{6} - \frac{π}{6}

同类项相加:

\frac{π}{6} - \frac{π}{6} = 0

= \frac{x}{2}

化简

\frac{3 π}{4} + 2 πn - \frac{π}{6} : 2 πn + \frac{7 π}{12}

\frac{3 π}{4} + 2 πn - \frac{π}{6}

对同类项分组

= 2 πn - \frac{π}{6} + \frac{3 π}{4}

6, 4

的最小公倍数:

12

6, 4

最小公倍数 (LCM)

6

质因数分解:

2 \cdot 3

6

6

除以

26 = 3 \cdot 2

= 2 \cdot 3

2, 3

都是质数，因此无法进一步因数分解

= 2 \cdot 3

4

质因数分解:

2 \cdot 2

4

4

除以

24 = 2 \cdot 2

= 2 \cdot 2

将每个因子乘以它在

6

或

4

中出现的最多次数

= 2 \cdot 2 \cdot 3

数字相乘:

2 \cdot 2 \cdot 3 = 12

= 12

根据最小公倍数调整分式

将每个分子乘以其分母转变为最小公倍数所要乘以的同一数值

12

对于

\frac{π}{6} :

将分母和分子乘以

2

\frac{π}{6} = \frac{π 2}{6 \cdot 2} = \frac{π 2}{12}

对于

\frac{3 π}{4} :

将分母和分子乘以

3

\frac{3 π}{4} = \frac{3 π 3}{4 \cdot 3} = \frac{9 π}{12}

= - \frac{π 2}{12} + \frac{9 π}{12}

因为分母相等，所以合并分式:

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

= \frac{- π 2 + 9 π}{12}

同类项相加:

- 2 π + 9 π = 7 π

= 2 πn + \frac{7 π}{12}

\frac{x}{2} = 2 πn + \frac{7 π}{12}

\frac{x}{2} = 2 πn + \frac{7 π}{12}

\frac{x}{2} = 2 πn + \frac{7 π}{12}

在两边乘以

2

\frac{x}{2} = 2 πn + \frac{7 π}{12}

在两边乘以

2

\frac{2 x}{2} = 2 \cdot 2 πn + 2 \cdot \frac{7 π}{12}

化简

\frac{2 x}{2} = 2 \cdot 2 πn + 2 \cdot \frac{7 π}{12}

化简

\frac{2 x}{2} : x

\frac{2 x}{2}

数字相除:

\frac{2}{2} = 1

= x

化简

2 \cdot 2 πn + 2 \cdot \frac{7 π}{12} : 4 πn + \frac{7 π}{6}

2 \cdot 2 πn + 2 \cdot \frac{7 π}{12}

2 \cdot 2 πn = 4 πn

2 \cdot 2 πn

数字相乘:

2 \cdot 2 = 4

= 4 πn

2 \cdot \frac{7 π}{12} = \frac{7 π}{6}

2 \cdot \frac{7 π}{12}

分式相乘:

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

= \frac{7 π 2}{12}

数字相乘:

7 \cdot 2 = 14

= \frac{14 π}{12}

约分:

2

= \frac{7 π}{6}

= 4 πn + \frac{7 π}{6}

x = 4 πn + \frac{7 π}{6}

x = 4 πn + \frac{7 π}{6}

x = 4 πn + \frac{7 π}{6}

x = 4 πn + \frac{π}{6}, x = 4 πn + \frac{7 π}{6}

在

x < 4 π

范围内的解

x = \frac{π}{6}, x = \frac{7 π}{6}, x = - \frac{23 π}{6}, x = - \frac{17 π}{6}, x = - \frac{47 π}{6}, x = - \frac{41 π}{6}, x = - \frac{71 π}{6}, x = - \frac{65 π}{6}, x = - \frac{95 π}{6}, x = - \frac{89 π}{6}

作图

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