Hello,

Trying to solve this,

$\displaystyle \int_a^b{\int_c^d{\cos(x^2+y^2)\,dx}\, dy} $

Over the reigon A, where A is

$\displaystyle x>=0, y>=0, x^2+y^2 <= \frac{pi}{2}$

I've attempted to work out initially what the limits a,b,c,d are. Would I be correct in thinking these were 0, sqrt(pi/2), 0, sqrt(pi/2)?

Then I'm struggling to convert these limits into polar form.

Thank you!