# Hint for $(1+e^y)\cos(t)dt + e^y\sin(y)dy = 0$

I have tried to find hints using Mathematica but it did not worked. I can not able to convert problem into any form Which I know how to solve this DE. Can you give me a hint? $$(1+e^y)\cos (t)dt + e^y\sin (y)dy = 0$$

$$\cos t dt = -\frac{e^y \sin y}{1 + e^y} dy$$
• @OlcayErtaş I'd start by writing $\sin$ as a complex exponential or using $\sinh$ and $\cosh$. I don't see a way to get rid of the hypergeometric function.