Area Between Curves with Multiple Intersections Practice Test

$\displaystyle \int_{0}^{2\pi}(\cos x+(-\cos x)),dx$

$\displaystyle \int_{0}^{2\pi}(\cos x-(-\cos x)),dx$

$\displaystyle \int_{0}^{2\pi}(\cos^2 x),dx$

$\displaystyle \int_{0}^{\pi/2}(\cos x-(-\cos x))dx+\int_{\pi/2}^{3\pi/2}((-\cos x)-\cos x)dx+\int_{3\pi/2}^{2\pi}(\cos x-(-\cos x))dx$

$\displaystyle \int_{0}^{2\pi}((-\cos x)-\cos x),dx$