Example: Stokes' Theorem (3)

[@Codex-pp7rc]

Underrated explanation

[@davidlee1770]

is the last integration a calculation error? I don't understand how the x^2+y^2 became r^3, when it's supposed to be r^2.

[@davidlee1770]

nevermind, I made a mistake converting dA to drdtheta

[@amiralidoroudiyan4331]

Thank you so much, sir