Question

Verify that the equation is an identity.

sin^2(theta/ 2 ) = tan (theta ) - sin ( theta ) / 2 tan ( theta)

Answer 1

\[\sin ^{2}\frac{ \theta }{ 2} = \frac{ \tan \theta - \sin \theta}{ 2 \tan \theta}\]

Answer 2

so, using known identities, you have to turn the left side into the right