tan 3 in cems of tar

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 42RE
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Express each function as a function of x.

tan 3x in terms of tan x.

 

* I tried working it out but im not sure im in the right direction, i attached pictures of my work.

tan 3 in cems of tar
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