Trigonometry
Without using a calculator, determine the exact value of the expression.
cos−1(cosπ6)\cos^{-1}\left(\cos\frac{\pi}{6}\right)cos−1(cos6π)
π6\frac{\pi}{6}6π
6π6\pi6π
π3\frac{\pi}{3}3π
2π3\frac{2\pi}{3}32π