# Math Help - A couple of First-Order DE's I

1. ## A couple of First-Order DE's I

y'=(1+x^2)*tgy

y'=(-1+y^2)/(x*y*(1-x^2))

Thanks.

2. ## re: A couple of First-Order DE's I

Here's a better idea, show some manners, show some effort, show where you are stuck, and you might get some help.

3. ## re: A couple of First-Order DE's I

A little help for the first one: write $\dfrac{dy}{\tan y}=(1+x^2)dx$ (separated variables). Now, integrate both sides, let's see what do you obtain.