Practice problem
Find the exact value of the following expression using half formula(s): cos7π12\cos\frac{7\pi}{12}cos127π
−2−32-\frac{\sqrt{2-\sqrt3}}{2}−22−3
4−52\frac{\sqrt{4-\sqrt5}}{2}24−5
3−23\frac{\sqrt{3-\sqrt2}}{3}33−2
−1−53-\frac{\sqrt{1-\sqrt5}}{3}−31−5
Type a concept, like “slope” or “photosynthesis”.
