Prove that: 1. 2cos π/13 cos 9π/13 + cos 3π/13 + cos 5π/13 = 0 Prove that: 1. 2cos π/13 cos 9π/13 + cos 3π/13 + cos 5π/13 = 0 October 24, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related
