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

11-58.

Find the area inside both *r* = 4 cos *θ *and *r* = 4 sin *θ . *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.