Question 602708
cscTHETA * tanTHETA + cot^2THETA= csc^2THETA 
--------
csc*tan + cot^2 = csc^2
(1/sin)*(sin/cos) + cos^2/sin^2 = 1/sin^2
1/cos + cos^2/sin^2 = 1/sin^2
sin^2/cos + cos^2 = 1
Not an identity