Question

Please help establish the identity.
1-[(sin^2v)/(1+cosv)]= cosv

Answer 1

\[1- \frac{\sin^2v}{1+cosv}=\cos{v}\]

\[\frac{1+cosv}{1+cosv}- \frac{\sin^2v}{1+cosv}=\cos{v}\]

\[\frac{1+cosv-\sin^2v}{1+cosv}=\cos{v}\]

\[\frac{(1-\sin^2v)+cosv}{1+cosv}=\cos{v}\]

\[\frac{\cos^2v+cosv}{1+cosv}=\cos{v}\]

\[\frac{cosv(cosv+1)}{(1+cosv)}=\cos{v}\]got it from here ?

Answer 2

amazing!

Answer 3

Tnx, my best class 98 in trig :))))

Answer 4

What about the previous one, do you need help with it ?