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受欢迎的三角函数 >

2sin(-3x-pi/4)=sqrt(2)

解答

2 sin (- 3 x - \frac{π}{4}) = 2

解答

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

+1

度数

x = - 3 0^{\circ} - 12 0^{\circ} n, x = - 6 0^{\circ} - 12 0^{\circ} n

求解步骤

2 sin (- 3 x - \frac{π}{4}) = 2

两边除以

2

2 sin (- 3 x - \frac{π}{4}) = 2

两边除以

2

\frac{2 sin ( - 3 x - \frac{π}{4} )}{2} = \frac{2}{2}

化简

sin (- 3 x - \frac{π}{4}) = \frac{2}{2}

sin (- 3 x - \frac{π}{4}) = \frac{2}{2}

sin (- 3 x - \frac{π}{4}) = \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}

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

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

解

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

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

将

\frac{π}{4}

到右边

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

两边加上

\frac{π}{4}

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

化简

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

化简

- 3 x - \frac{π}{4} + \frac{π}{4} : - 3 x

- 3 x - \frac{π}{4} + \frac{π}{4}

同类项相加:

- \frac{π}{4} + \frac{π}{4} = 0

= - 3 x

化简

\frac{π}{4} + 2 πn + \frac{π}{4} : \frac{π}{2} + 2 πn

\frac{π}{4} + 2 πn + \frac{π}{4}

对同类项分组

= \frac{π}{4} + \frac{π}{4} + 2 πn

合并分式

\frac{π}{4} + \frac{π}{4} : \frac{π}{2}

使用法则

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

= \frac{π + π}{4}

同类项相加:

π + π = 2 π

= \frac{2 π}{4}

约分:

2

= \frac{π}{2}

= \frac{π}{2} + 2 πn

- 3 x = \frac{π}{2} + 2 πn

- 3 x = \frac{π}{2} + 2 πn

- 3 x = \frac{π}{2} + 2 πn

两边除以

- 3

- 3 x = \frac{π}{2} + 2 πn

两边除以

- 3

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

化简

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

化简

\frac{- 3 x}{- 3} : x

\frac{- 3 x}{- 3}

使用分式法则:

\frac{- a}{- b} = \frac{a}{b}

= \frac{3 x}{3}

数字相除:

\frac{3}{3} = 1

= x

化简

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

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

\frac{\frac{π}{2}}{- 3} = - \frac{π}{6}

\frac{\frac{π}{2}}{- 3}

使用分式法则:

\frac{a}{- b} = - \frac{a}{b}

= - \frac{\frac{π}{2}}{3}

使用分式法则:

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

\frac{\frac{π}{2}}{3} = \frac{π}{2 \cdot 3}

= - \frac{π}{2 \cdot 3}

数字相乘:

2 \cdot 3 = 6

= - \frac{π}{6}

= - \frac{π}{6} + \frac{2 πn}{- 3}

使用分式法则:

\frac{a}{- b} = - \frac{a}{b}

= - \frac{π}{6} - \frac{2 πn}{3}

x = - \frac{π}{6} - \frac{2 πn}{3}

x = - \frac{π}{6} - \frac{2 πn}{3}

x = - \frac{π}{6} - \frac{2 πn}{3}

解

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

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

将

\frac{π}{4}

到右边

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

两边加上

\frac{π}{4}

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

化简

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

化简

- 3 x - \frac{π}{4} + \frac{π}{4} : - 3 x

- 3 x - \frac{π}{4} + \frac{π}{4}

同类项相加:

- \frac{π}{4} + \frac{π}{4} = 0

= - 3 x

化简

\frac{3 π}{4} + 2 πn + \frac{π}{4} : 2 πn + π

\frac{3 π}{4} + 2 πn + \frac{π}{4}

对同类项分组

= 2 πn + \frac{π}{4} + \frac{3 π}{4}

合并分式

\frac{π}{4} + \frac{3 π}{4} : π

使用法则

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

= \frac{π + 3 π}{4}

同类项相加:

π + 3 π = 4 π

= \frac{4 π}{4}

数字相除:

\frac{4}{4} = 1

= π

= 2 πn + π

- 3 x = 2 πn + π

- 3 x = 2 πn + π

- 3 x = 2 πn + π

两边除以

- 3

- 3 x = 2 πn + π

两边除以

- 3

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

化简

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

化简

\frac{- 3 x}{- 3} : x

\frac{- 3 x}{- 3}

使用分式法则:

\frac{- a}{- b} = \frac{a}{b}

= \frac{3 x}{3}

数字相除:

\frac{3}{3} = 1

= x

化简

\frac{2 πn}{- 3} + \frac{π}{- 3} : - \frac{2 πn}{3} - \frac{π}{3}

\frac{2 πn}{- 3} + \frac{π}{- 3}

使用分式法则:

\frac{a}{- b} = - \frac{a}{b}

= - \frac{2 πn}{3} + \frac{π}{- 3}

使用分式法则:

\frac{a}{- b} = - \frac{a}{b}

= - \frac{2 πn}{3} - \frac{π}{3}

x = - \frac{2 πn}{3} - \frac{π}{3}

x = - \frac{2 πn}{3} - \frac{π}{3}

x = - \frac{2 πn}{3} - \frac{π}{3}

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

作图

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