this derived from by using
in never negative, so the sign of the fractional expression depends only on the sign of
Hi everyone:
Is there any way to prove the following identity:
tan(A/2)=(sinA)/(1+cosA)
without drawing a diagram? I know that it is a basic trig identity, but I don't know how to prove it by manipulating hte formulas.
Thanks!
Manipulating R.H.S.
Note that
Introduce into the equation and you should solve your problem
Edit
In the time I took to write this I was beaten by 2 other forum users
I really need to take typing classes.
On the other hand, at least I provided a different method