2sin(x)=-3

解答

2 sin (x) = - 3

x \in R 无解

求解步骤

2 sin (x) = - 3

两边除以

2

2 sin (x) = - 3

两边除以

2

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

化简

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

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

- 1 \leq sin (x) \leq 1

x \in R 无解

tan (θ) = \frac{- 12}{5}, cot (θ)

3 cos (1 x) = - sin (1 x)

0 = 3 cos (θ)

1 - 3 sin^{2} (x) = cos^{2} (x) - sin^{2} (x)

sin^{2} (θ) - sin (θ) + 1 = cos^{2} (θ)