trigonometry

Question: The general value of $\theta $satisfying the equation $2{{\sin }^{2}}\theta -3\sin \theta -2=0$ is

1) $n\pi +{{(-1)}^{n}}\frac{\pi }{6}$

2) $n\pi +{{(-1)}^{n}}\frac{\pi }{2}$

3) $n\pi +{{(-1)}^{n}}\frac{5\pi }{6}$

4) $n\pi +{{(-1)}^{n}}\frac{7\pi }{6}$

Solution:

Explanation: No Explanation

Solution of trigonometric equations

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