Prove the following: 9. cos(3π/2 +x) cos (2π + x) [cot(3π/2 – x) + cot (2π + x)] = 1 Prove the following: 9. cos(3π/2 +x) cos (2π + x) [cot(3π/2 - x) + cot (2π + x)] = 1 October 22, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related