Mathematics
(tan 25° / cosec 65°)² + (cot 25° / sec 65°)² + 2 tan 18° tan 45° tan 72°
Related Questions
Without using trigonometric tables, evaluate the following:
sin2 34° + sin2 56° + 2 tan 18° tan 72° - cot2 30°.
Without using trigonometric tables, evaluate the following:
(cos2 25° + cos2 65°) + cosec θ sec(90° - θ) - cot θ tan (90° - θ).
Prove the following identities, where the angles involved are acute angles for which the trigonometric ratios are defined:
(sec A + tan A)(1 - sin A) = cos A.