Prove the following: 15. cot 4x (sin 5x + sin 3x) = cot x (sin 5x – sin 3x) Prove the following: 15. cot 4x (sin 5x + sin 3x) = cot x (sin 5x – sin 3x) October 22, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related