Example 26 Prove that cos 2x cos x/2 – cos 3x cos 9x/2 = sin 5x sin 5x/2. Example 26 Prove that cos 2x cos x/2 - cos 3x cos 9x/2 = sin 5x sin 5x/2. October 22, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related
