mwood19314
Nov 4, 2011, 10:34 AM
2tan(x/2)/(1 tan^2(x/2)) = sin x
ebaines
Nov 4, 2011, 10:55 AM
The best way to get started is convert the tan functions to their sine and cosine equivalents, and simplify. You should end up with an equation that looks a lot like this identity:
sin(2a) = 2sin(a)cos(a)