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受欢迎的三角函数 >

4sec(θ)+6=-2

解答

4 sec (θ) + 6 = - 2

解答

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

+1

度数

θ = 12 0^{\circ} + 36 0^{\circ} n, θ = 24 0^{\circ} + 36 0^{\circ} n

求解步骤

4 sec (θ) + 6 = - 2

将

6

到右边

4 sec (θ) + 6 = - 2

两边减去

6

4 sec (θ) + 6 - 6 = - 2 - 6

化简

4 sec (θ) = - 8

4 sec (θ) = - 8

两边除以

4

4 sec (θ) = - 8

两边除以

4

\frac{4 sec ( θ )}{4} = \frac{- 8}{4}

化简

\frac{4 sec ( θ )}{4} = \frac{- 8}{4}

化简

\frac{4 sec ( θ )}{4} : sec (θ)

\frac{4 sec ( θ )}{4}

数字相除:

\frac{4}{4} = 1

= sec (θ)

化简

\frac{- 8}{4} : - 2

\frac{- 8}{4}

使用分式法则:

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

= - \frac{8}{4}

数字相除:

\frac{8}{4} = 2

= - 2

sec (θ) = - 2

sec (θ) = - 2

sec (θ) = - 2

sec (θ) = - 2

的通解

sec (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} sec (x) 1 \frac{2 3}{3} 22 Undefined - 2 - 2 - \frac{2 3}{3} 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} sec (x) - 1 - \frac{2 3}{3} - 2 - 2 Undefined 22 \frac{2 3}{3}

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

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

作图

流行的例子

-2sin(x)+cos(2x)*2=0

- 2 sin (x) + cos (2 x) \cdot 2 = 0

sec^2(x)-2=tan^2(x)

sec^{2} (x) - 2 = tan^{2} (x)

4tan^2(x)-1=tan^2(x)

4 tan^{2} (x) - 1 = tan^{2} (x)

tan(θ)sin(θ)+sin(θ)=0

tan (θ) sin (θ) + sin (θ) = 0

tan (x) = 0.5