# Math Help - Integral of 1/cotx

1. ## Integral of 1/cotx

I was gonna solve an ODE then I got to a point where I had to solve \displaystyle \int{\frac{1}{cot{\theta},} d{\theta}}

The question was solve the ODE

cot{\theta}d{\rho}+{\rho}d{\theta} =0

2. Rewrite it as $\displaystyle \int{\frac{\sin{\theta}}{\cos{\theta}}\,d\theta}$ and solve using a substitution.