This is an important question from the
Book- ML Aggarwal
Chapter- Trigonometric Identities
We have to prove that
(i) (Cot theta +cosec theta-1) /(cot theta – cosec theta+1) =(1+cos theta) /sin theta (ii) Sin theta/cot theta+cosec theta = 2+ sin theta/cot theta-cosec theta
Trigonometric Identities, class 10th, chapter 18th, question no27 , ICSE board, ML aggarwal..