the value of ∫cot2xdx is________________
Evaluate ∫cos2 xdx_________
\(\begin{array}{l} I_n\left(x\right)=\int_0^x\frac{1}{\left(t^2+5\right)^n}dt, n=1, 2, 3,\cdots\end{array}\)
Then
If \(\frac{d y}{d x}+2 y \tan x=\sin x, 0\)