What is the exact value of cos pi 2 July 8, 2019 16 32 64 128 Find the exact value of cos pi 2 Find the exact value of cos pi 2 in simplest form with a rational denominator Given x=pi/3 what is the exact value of cos(2pi - x) Given x pi 6 what is the exact value of cos 2pi x Exact value of cos 2 pi over 3