# Ideas for 1st order Non-Linear DE

by awetawef
Tags: ideas, nonlinear, order
 P: 3 I don't know very much about DEQs, can someone point me in the right direction for solving this? Note: $\phi$ is a function of another variable and C_1, C_2 are constants. $$-\phi ^2 \cdot C_1=\frac{1}{1+\phi ' ^2}+C_2$$ I have tried trig sub, but I didn't get anywhere. Regards. EDIT: The LaTeX on this website doesn't appear to like me, though I don't understand why.