Question

Help on integra

Answer 1

\[\int\limits_{\Pi/4}^{3\Pi/4}\csc \theta \cot \theta d \theta\]

Answer 2

im need \[-(\csc 3\Pi/4)-(-cosec \Pi/4)\]

Answer 3

let u=csc theta

Answer 4

im have the result, is \[-\sqrt{2}-(-\sqrt{2})=0\]
but I do not know how to get to it, which is what matters

Answer 5

and what i am saying is that inorder to integrate it, you should use u substituion

Let u=csc (theta), the du=-csc*(theta)cot(theta)