### Home > APCALC > Chapter 11 > Lesson 11.2.2 > Problem 11-57

11-57.

Calculate the area inside both and

*. 11-57 HW eTool (Desmos). Homework Help ✎*

Determine the bounds by solving 4cos(*θ*) = 4sin(*θ*).

By looking at the graph, you can calculate the area inside of *r* = sin(*θ*) for 0 ≤ *θ* ≤ *π*/4 and double it.