diff-equation

Question: The solution of $dy=\cos x(2-y\cos \text{ec}x)dx$ where $y=2$ when $x=\frac{\pi }{2}$ is



1) $y=\sin x+\text{cosec }x$
2) $y=\tan \frac{x}{2}+\cot \frac{x}{2}$
3) $y=\frac{1}{\sqrt{2}}\sec \frac{x}{2}+\sqrt{2}\cos \frac{x}{2}$
4) None of these
Solution: Explanation: No Explanation
Linear differential equations

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