### Home > CALC > Chapter 11 > Lesson 11.2.2 > Problem11-58

11-58.

Find the area inside both $r = 4\operatorname{cos}θ$ and $r = 4\operatorname{sin}θ$ .

Determine the bounds by solving $4\operatorname{cos}(θ) = 4\operatorname{sin}(θ)$.
By looking at the graph, you can calculate the area inside of $r =\operatorname{sin}(θ)$ for $0 ≤ θ ≤ π/4$ and double it.