Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x

Sahay Sir > Question Answers > Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x
Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x
22
Oct
Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x October 22, 2021 Category: Chapter 3 - [...]
Posted in: Chapter 3 - Trigonometric Functions , Maths , NCERT Exemplar Class 11 ,
Tags: Prove the following: 10. sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos x ,