Question

Prove that cos 3 theta equal to 1 by 2 (a tube + 1 by a tree cross packet 1 if cos theta is equal to 1 by 2 (a + 1))

Answer 1

Answer:

If cosθ=12(a+1a) then show that cos3θ=12(a3+1a3). Related Videos. VIEW ALL · If `a^2+b^2+c^2=1`. play. 11:27 · If `costheta ...