This is an important question from the

Book- ML Aggarwal

Board- ICSE

Publication- Avichal

Chapter- Trigonometric Identities

Chapter number-18

We have to prove that

(i) Root{(secA-1) /(secA+1)} + Root{(secA+1) /(secA-1) = 2cosecA (ii) cos A cot A/ (1 – sin A) = 1 + cosec A

Trigonometric Identities, class 10th, chapter 18th, question no 24 , ICSE board, ML aggarwal..

Solution: