Question 1004070
For example,


*[tex \large \tan 4x = \frac{\tan 3x + \tan x}{1 - (\tan 3x)( \tan x)}]


And you can express tan 3x in terms of tan 2x and tan x using the tangent addition formula, and so on. If you are solving tan 4x = tan x, you might want to express tan 4x entirely in terms of tan x.