trigonometry

Question: Common roots of the equations $2{{\sin }^{2}}x+{{\sin }^{2}}2x=2$ and $\sin 2x+\cos 2x=\tan x,$ are

1) $x=(2n-1)\frac{\pi }{2}$

2) $x=(2n+1)\frac{\pi }{4}$

3) $x=(2n+1)\frac{\pi }{3}$

4) None of these

Solution:

Explanation: No Explanation

Solution of trigonometric equations

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