Establish the following identity:

Please help, I'm not sure if I'm starting this correctly.

My attempt was(using "Left Hand Side"):

· Convert the tan and tan^2 to sin(x)/cos(x) and sin^2(x)/cos^2(x) respectively.

(cross multiply flipped denominator?)

Step 3. FOIL the sinx/cosx

Step 4. Fid a common denominator to get:

I don't see how to simplify any further to get it to match the "Right Hand Side".