Prove the following: 8. cos(π + x) cos (-x) / sin (π + x) cos (π/2 + x) = cot^2x Prove the following: 8. cos(π + x) cos (-x) / sin (π + x) cos (π/2 + x) = cot^2x October 22, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related