Solve the encircled question
Kindly refer the link for your query.
https://www.meritnation.com/cbse/class10/textbook-solutions/math/rd-sharma-(2016)/trigonometric-identities/page6.43-exercise-6.1-qno31/2150_10167_27510/
Regards
https://www.meritnation.com/cbse/class10/textbook-solutions/math/rd-sharma-(2016)/trigonometric-identities/page6.43-exercise-6.1-qno31/2150_10167_27510/
Regards