Prove the following: 25. cos 6x = 32 cos^6 x – 48cos^4 x + 18 cos^2 x – 1 Prove the following: 25. cos 6x = 32 cos^6 x – 48cos^4 x + 18 cos^2 x – 1 October 24, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related