Mathematics
Prove the following identities, where the angles involved are acute angles for which the trigonometric ratios are defined:
(sin A + sec A)2 + (cos A + cosec A)2 = (1 + sec A cosec A)2.
Prove the following identities, where the angles involved are acute angles for which the trigonometric ratios are defined:
(sin A + sec A)2 + (cos A + cosec A)2 = (1 + sec A cosec A)2.