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受欢迎的三角函数 >

4sin^2(x-60)=3

解答

4 sin^{2} (x - 6 0^{\circ}) = 3

解答

x = 12 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 18 0^{\circ}, x = 36 0^{\circ} n + 30 0^{\circ}, x = 36 0^{\circ} n + 36 0^{\circ}

+1

弧度

x = \frac{2 π}{3} + 2 πn, x = π + 2 πn, x = \frac{5 π}{3} + 2 πn, x = 2 π + 2 πn

求解步骤

4 sin^{2} (x - 6 0^{\circ}) = 3

用替代法求解

4 sin^{2} (x - 6 0^{\circ}) = 3

令

: sin (x - 6 0^{\circ}) = u

4 u^{2} = 3

4 u^{2} = 3 : u = \frac{3}{2}, u = - \frac{3}{2}

4 u^{2} = 3

两边除以

4

4 u^{2} = 3

两边除以

4

\frac{4 u ^{2}}{4} = \frac{3}{4}

化简

u^{2} = \frac{3}{4}

u^{2} = \frac{3}{4}

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

u = \frac{3}{4}, u = - \frac{3}{4}

\frac{3}{4} = \frac{3}{2}

\frac{3}{4}

使用根式运算法则:

假定

a \geq 0, b \geq 0

= \frac{3}{4}

4 = 2

4

因式分解数字:

4 = 2^{2}

= 2^{2}

使用根式运算法则:

2^{2} = 2

= 2

= \frac{3}{2}

- \frac{3}{4} = - \frac{3}{2}

- \frac{3}{4}

化简

\frac{3}{4} : \frac{3}{2}

\frac{3}{4}

使用根式运算法则:

假定

a \geq 0, b \geq 0

= \frac{3}{4}

4 = 2

4

因式分解数字:

4 = 2^{2}

= 2^{2}

使用根式运算法则:

2^{2} = 2

= 2

= \frac{3}{2}

= - \frac{3}{2}

u = \frac{3}{2}, u = - \frac{3}{2}

u = sin (x - 6 0^{\circ})

代回

sin (x - 6 0^{\circ}) = \frac{3}{2}, sin (x - 6 0^{\circ}) = - \frac{3}{2}

sin (x - 6 0^{\circ}) = \frac{3}{2}, sin (x - 6 0^{\circ}) = - \frac{3}{2}

sin (x - 6 0^{\circ}) = \frac{3}{2} : x = 12 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 18 0^{\circ}

sin (x - 6 0^{\circ}) = \frac{3}{2}

sin (x - 6 0^{\circ}) = \frac{3}{2}

的通解

sin (x)

周期表（周期为

36 0^{\circ} n

"）：

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}

x - 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n

x - 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n

解

x - 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n : x = 12 0^{\circ} + 36 0^{\circ} n

x - 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 6 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

6 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 12 0^{\circ} + 36 0^{\circ} n

6 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 6 0^{\circ} + 6 0^{\circ} + 36 0^{\circ} n

合并分式

6 0^{\circ} + 6 0^{\circ} : 12 0^{\circ}

使用法则

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

= \frac{18 0 ^{\circ} + 18 0 ^{\circ}}{3}

同类项相加:

18 0^{\circ} + 18 0^{\circ} = 36 0^{\circ}

= 12 0^{\circ}

= 12 0^{\circ} + 36 0^{\circ} n

x = 12 0^{\circ} + 36 0^{\circ} n

x = 12 0^{\circ} + 36 0^{\circ} n

x = 12 0^{\circ} + 36 0^{\circ} n

解

x - 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n : x = 36 0^{\circ} n + 18 0^{\circ}

x - 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 12 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

12 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 36 0^{\circ} n + 18 0^{\circ}

12 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 36 0^{\circ} n + 6 0^{\circ} + 12 0^{\circ}

合并分式

6 0^{\circ} + 12 0^{\circ} : 18 0^{\circ}

使用法则

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

= \frac{18 0 ^{\circ} + 36 0 ^{\circ}}{3}

同类项相加:

18 0^{\circ} + 36 0^{\circ} = 54 0^{\circ}

= 18 0^{\circ}

数字相除:

\frac{3}{3} = 1

= 18 0^{\circ}

= 36 0^{\circ} n + 18 0^{\circ}

x = 36 0^{\circ} n + 18 0^{\circ}

x = 36 0^{\circ} n + 18 0^{\circ}

x = 36 0^{\circ} n + 18 0^{\circ}

x = 12 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 18 0^{\circ}

sin (x - 6 0^{\circ}) = - \frac{3}{2} : x = 36 0^{\circ} n + 30 0^{\circ}, x = 36 0^{\circ} n + 36 0^{\circ}

sin (x - 6 0^{\circ}) = - \frac{3}{2}

sin (x - 6 0^{\circ}) = - \frac{3}{2}

的通解

sin (x)

周期表（周期为

36 0^{\circ} n

"）：

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}

x - 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n

x - 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n

解

x - 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n : x = 36 0^{\circ} n + 30 0^{\circ}

x - 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 24 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

24 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 36 0^{\circ} n + 30 0^{\circ}

24 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 36 0^{\circ} n + 6 0^{\circ} + 24 0^{\circ}

合并分式

6 0^{\circ} + 24 0^{\circ} : 30 0^{\circ}

使用法则

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

= \frac{18 0 ^{\circ} + 72 0 ^{\circ}}{3}

同类项相加:

18 0^{\circ} + 72 0^{\circ} = 90 0^{\circ}

= 30 0^{\circ}

= 36 0^{\circ} n + 30 0^{\circ}

x = 36 0^{\circ} n + 30 0^{\circ}

x = 36 0^{\circ} n + 30 0^{\circ}

x = 36 0^{\circ} n + 30 0^{\circ}

解

x - 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n : x = 36 0^{\circ} n + 36 0^{\circ}

x - 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 30 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

30 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 36 0^{\circ} n + 36 0^{\circ}

30 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 36 0^{\circ} n + 6 0^{\circ} + 30 0^{\circ}

合并分式

6 0^{\circ} + 30 0^{\circ} : 36 0^{\circ}

使用法则

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

= \frac{18 0 ^{\circ} + 90 0 ^{\circ}}{3}

同类项相加:

18 0^{\circ} + 90 0^{\circ} = 108 0^{\circ}

= 36 0^{\circ}

数字相除:

\frac{6}{3} = 2

= 36 0^{\circ}

= 36 0^{\circ} n + 36 0^{\circ}

x = 36 0^{\circ} n + 36 0^{\circ}

x = 36 0^{\circ} n + 36 0^{\circ}

x = 36 0^{\circ} n + 36 0^{\circ}

x = 36 0^{\circ} n + 30 0^{\circ}, x = 36 0^{\circ} n + 36 0^{\circ}

合并所有解

x = 12 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 18 0^{\circ}, x = 36 0^{\circ} n + 30 0^{\circ}, x = 36 0^{\circ} n + 36 0^{\circ}

作图

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