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受欢迎的三角函数 >

csc(x)(2sin(x)-sqrt(2))=0

解答

csc (x) (2 sin (x) - 2) = 0

解答

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

+1

度数

x = 4 5^{\circ} + 36 0^{\circ} n, x = 13 5^{\circ} + 36 0^{\circ} n

求解步骤

csc (x) (2 sin (x) - 2) = 0

分别求解每个部分

csc (x) = 0 or 2 sin (x) - 2 = 0

csc (x) = 0 :

无解

csc (x) = 0

csc (x) \leq - 1 or csc (x) \geq 1

无解

2 sin (x) - 2 = 0 : x = \frac{π}{4} + 2 πn, x = \frac{3 π}{4} + 2 πn

2 sin (x) - 2 = 0

将

2

到右边

2 sin (x) - 2 = 0

两边加上

2

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

化简

2 sin (x) = 2

2 sin (x) = 2

两边除以

2

2 sin (x) = 2

两边除以

2

\frac{2 sin ( x )}{2} = \frac{2}{2}

化简

sin (x) = \frac{2}{2}

sin (x) = \frac{2}{2}

sin (x) = \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}

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

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

合并所有解

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

作图

流行的例子

(700)/(sin(90))=(236.3277)/(sin(θ))

\frac{700}{sin ( 9 0 ^{\circ} )} = \frac{236.3277}{sin ( θ )}

cos(x)+cos(2x)=-0.75

cos (x) + cos (2 x) = - 0.75

solvefor x,2y=sin(2x)

so l v e f or x, 2 y = sin (2 x)

-csc(θ)+5=cot(θ)+6

- csc (θ) + 5 = cot (θ) + 6

2sin^2(x)-3=cos(x)-2

2 sin^{2} (x) - 3 = cos (x) - 2