This is an important question from the

Book- ML Aggarwal

Board- ICSE

Publication- Avichal

Chapter- Trigonometric Identities

Chapter number-18

We have to prove the following equality

(i) cosec6 A – cot6 A = 3 cot2 A cosec2 A + 1 (ii) sec6 A – tan6 A = 1 + 3 tan2 A + 3 tan4 A

Trigonometric Identities, class 10th, chapter 18th, question no , ICSE board, ML aggarwal..

Solution:(i) cosec

^{6}A – cot^{6}A = 3 cot^{2}A cosec^{2}A + 1