Question

Prove that , tan 4x = 4 tan x (1-tan^2 x ) / (1-6 tan^2x + tan^4x).

Answer 1

Based on your question to prove that both of the equations are true, you must first simplify them. So in accordance with my calculation and practicing step by step procedure i came with a solution and result in an answer of 1-(2tanx/1-tan^2x)^2