Practice problem
Find the value of xxx in the interval (0,π)(0,\pi)(0,π) satisfying cos(2x)=cosx\cos(2x) = \cos xcos(2x)=cosx.
π3\frac{\pi}{3}3π
2π3\frac{2\pi}{3}32π
π2\frac{\pi}{2}2π
13π16\frac{13\pi}{16}1613π
15π16\frac{15\pi}{16}1615π
Type a concept, like “slope” or “photosynthesis”.
