## Differential Equation

Please help. Been staring at it for a few hours now.

cosysin2xdx +(cos^2y - cos^2x)dy = 0

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Please help. Been staring at it for a few hours now.

cosysin2xdx +(cos^2y - cos^2x)dy = 0

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(y^4 - 2xy) dx + 3 x^2 dy= 0

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Bernoulli?

1- 3rss' + r^2 s^2 s' =0