Suppose you want to use a Half-Angle Identity to find the

Last updated: 8/11/2022

Suppose you want to use a Half-Angle Identity to find the exact value of the following expression. cos 67.5° A.cos 67.5° =√1 + cos___/2 B.cos 67.5° =-√1 + cos___/2 C.cos 67.5° =-√1 + cos___/2 D.cos 67.5° =√1 + cos___/2