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受欢迎的 >

3cos(x)-2=1

解答

3 cos (x) - 2 = 1

解答

x = 2 πn

+1

度数

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

求解步骤

3 cos (x) - 2 = 1

将

2

到右边

3 cos (x) - 2 = 1

两边加上

2

3 cos (x) - 2 + 2 = 1 + 2

化简

3 cos (x) = 3

3 cos (x) = 3

两边除以

3

3 cos (x) = 3

两边除以

3

\frac{3 cos ( x )}{3} = \frac{3}{3}

化简

cos (x) = 1

cos (x) = 1

cos (x) = 1

的通解

cos (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} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{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} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

x = 0 + 2 πn

x = 0 + 2 πn

解

x = 0 + 2 πn : x = 2 πn

x = 0 + 2 πn

0 + 2 πn = 2 πn

x = 2 πn

x = 2 πn

流行的例子

sin(4x)=-sin(2x)

sin (4 x) = - sin (2 x)

solvefor t,x=1-2cos(2t)求解

t, x = 1 - 2 cos (2 t)

solvefor x,sin(3x)=-(sqrt(3))/2 求解

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

cos (x) = 0.587

(sec(x)+csc(x))/(1+tan(x))=sin(x)

\frac{sec ( x ) + csc ( x )}{1 + tan ( x )} = sin (x)