PDA

View Full Version : Trig Identity


brandon26
Oct12-05, 03:12 PM
Prove the identity:

sinA / (1+cosA) = tan (A/2).

Im going no where with this, please help?:confused: :confused:

Fermat
Oct12-05, 03:36 PM
use the double angle formula for cos2ø.

brandon26
Oct12-05, 03:38 PM
Sorry I dont understand. And I am trying to apply the double angle formulae but I am just getting confused.

brandon26
Oct12-05, 03:57 PM
Problem solved...No need to reply