I'm doing polar integration and I'm having some problems.
$\displaystyle 4*\int_{0}^{\frac{\pi}{2}} \int_{0}^{1} ln(r^{2}+1)rdrd\theta$
The answer comes out to
$\displaystyle \pi(ln(4)-1)$ but I always end up with $\displaystyle \pi(ln(2)-1)$
I'm doing polar integration and I'm having some problems.
$\displaystyle 4*\int_{0}^{\frac{\pi}{2}} \int_{0}^{1} ln(r^{2}+1)rdrd\theta$
The answer comes out to
$\displaystyle \pi(ln(4)-1)$ but I always end up with $\displaystyle \pi(ln(2)-1)$