Mathematics
Related Questions
Prove the following identities, where the angles involved are acute angles for which the trigonometric ratios are defined:
sec4 A(1 - sin4 A) - 2 tan2 A = 1.
Prove the following identities, where the angles involved are acute angles for which the trigonometric ratios are defined:
(sec A - tan A)2(1 + sin A) = 1 - sin A.