### Home > CALC > Chapter 11 > Lesson 11.1.3 > Problem11-32

11-32.

Find the area within the curve r = 6 + 3 cos(5θ). Homework Help ✎

$r^2=36+36\cos(5\theta)+9\frac{1+\cos(10\theta)}{2}$

$\int_0^{2\pi}\Big(18+18\cos(5\theta)+\frac{9}{4}+\frac{9\cos(10\theta)}{4}\Big)d\theta$

Integrate.