Could anyone show me how to find the integral of
$1\over{\sin^2x}$ and $1\over{\sin^4x}$
systematically?
Could anyone show me how to find the integral of
$1\over{\sin^2x}$ and $1\over{\sin^4x}$
systematically?
Try the change of variables $u = \cot(x)$.
Hint:
$d(\cot{x})=-\dfrac{1}{\sin^2{x}}dx \\ 1+\cot^2{x}=\dfrac{1}{\sin^2{x}} $