zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的三角函数 >

sin(2θ)=-0.6

解答

sin (2 θ) = - 0.6

解答

θ = - \frac{0.64350 \dots}{2} + πn, θ = \frac{π}{2} + \frac{0.64350 \dots}{2} + πn

+1

度数

θ = - 18.43494 \dots^{\circ} + 18 0^{\circ} n, θ = 108.43494 \dots^{\circ} + 18 0^{\circ} n

求解步骤

sin (2 θ) = - 0.6

使用反三角函数性质

sin (2 θ) = - 0.6

sin (2 θ) = - 0.6

的通解

sin (x) = - a \Rightarrow x = arcsin (- a) + 2 πn, x = π + arcsin (a) + 2 πn

2 θ = arcsin (- 0.6) + 2 πn, 2 θ = π + arcsin (0.6) + 2 πn

2 θ = arcsin (- 0.6) + 2 πn, 2 θ = π + arcsin (0.6) + 2 πn

解

2 θ = arcsin (- 0.6) + 2 πn : θ = - \frac{arcsin ( \frac{3}{5} )}{2} + πn

2 θ = arcsin (- 0.6) + 2 πn

化简

arcsin (- 0.6) + 2 πn : - arcsin (\frac{3}{5}) + 2 πn

arcsin (- 0.6) + 2 πn

arcsin (- 0.6) = - arcsin (\frac{3}{5})

arcsin (- 0.6)

= arcsin (- \frac{3}{5})

利用以下特性:

arcsin (- x) = - arcsin (x)

arcsin (- \frac{3}{5}) = - arcsin (\frac{3}{5})

= - arcsin (\frac{3}{5})

= - arcsin (\frac{3}{5}) + 2 πn

2 θ = - arcsin (\frac{3}{5}) + 2 πn

两边除以

2

2 θ = - arcsin (\frac{3}{5}) + 2 πn

两边除以

2

\frac{2 θ}{2} = - \frac{arcsin ( \frac{3}{5} )}{2} + \frac{2 πn}{2}

化简

θ = - \frac{arcsin ( \frac{3}{5} )}{2} + πn

θ = - \frac{arcsin ( \frac{3}{5} )}{2} + πn

解

2 θ = π + arcsin (0.6) + 2 πn : θ = \frac{π}{2} + \frac{arcsin ( 0.6 )}{2} + πn

2 θ = π + arcsin (0.6) + 2 πn

两边除以

2

2 θ = π + arcsin (0.6) + 2 πn

两边除以

2

\frac{2 θ}{2} = \frac{π}{2} + \frac{arcsin ( 0.6 )}{2} + \frac{2 πn}{2}

化简

θ = \frac{π}{2} + \frac{arcsin ( 0.6 )}{2} + πn

θ = \frac{π}{2} + \frac{arcsin ( 0.6 )}{2} + πn

θ = - \frac{arcsin ( \frac{3}{5} )}{2} + πn, θ = \frac{π}{2} + \frac{arcsin ( 0.6 )}{2} + πn

以小数形式表示解

θ = - \frac{0.64350 \dots}{2} + πn, θ = \frac{π}{2} + \frac{0.64350 \dots}{2} + πn

作图

流行的例子

cot (θ) = 0

tan(x)=-sqrt(3)

tan (x) = - 3

sin (3 5^{\circ})

sin (\frac{7 π}{4})

cot (\frac{π}{6})