Prove the following: 6. cos(π/4-x)cos(π/4-y)-sin(π/4-x)sin(π/4-y) = sin (x+y) Prove the following: 6. cos(π/4-x)cos(π/4-y)-sin(π/4-x)sin(π/4-y) = sin (x+y) October 22, 2021 Category: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related
