differentiation

Question: If ${\sin ^2}x + 2\cos y + xy = 0$, then $\frac{{dy}}{{dx}} = $



1) $\frac{{y + 2\sin x}}{{2\sin y + x}}$
2) $\frac{{y + \sin 2x}}{{2\sin y - x}}$
3) $\frac{{y + 2\sin x}}{{\sin y + x}}$
4) None of these
Solution: Explanation: Explanation
Implicit-function

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