How to evaluate a double integral using polar coordinates

We will integrate a double integral cos(x^2+y^2) dydx by using polar coordinates. Here's the video on why dydx=rdθ    • Why is there an extra "r" in dxdy=rdrdθ? (...   How to evaluate double integrals (& how to change the order of integration) 10 examples, calculus 3    • How to evaluate double integrals (& how to...   ----------------------------- Support this channel and get my calculus notes on Patreon: 👉   / blackpenredpen   Get the coolest math shirts from my Amazon store 👉 https://amzn.to/3qBeuw6 ----------------------------- #calculus #bprpcalculus #apcalculus #tutorial #math