Question 845370
I need to prove the following trig identity" 
(tan 4t - tan 2t)/ (1+ tan4t tan2t) = (2tan t)/ (1-tan^2 t) 
----
The left side is tan(4t-2t) = tan(2t)
-----
The right side is tan(t + t) = tan(2t)
===================
Cheers,
Stan H.
------------------