Practice problem
Find an exact value for cos(7π12)\cos(\frac{7\pi}{12})cos(127π).
2+64\frac{\sqrt2+\sqrt6}442+6
−2−64\frac{-\sqrt2-\sqrt6}44−2−6
2−64\frac{\sqrt2-\sqrt6}442−6
6−24\frac{\sqrt6-\sqrt2}446−2
Type a concept, like “slope” or “photosynthesis”.