![Ex 7.3, 7 - Chapter 7 Class 12 Integrals - Part 2](https://d1avenlh0i1xmr.cloudfront.net/971c0ab0-7b3e-4b42-b906-100ed3d77eb4/slide21.jpg)
Ex 7.3
Last updated at April 16, 2024 by Teachoo
Ex 7.3, 7 4 sin 8 sin 4 sin 8 We know that 2 = + + = 1 2 + + Replace A by 4 & B by 8 sin 4 sin 8 = 1 2 cos 4 +8 + cos 4 8 sin 4 sin 8 = 1 2 cos 12 + cos 4 sin 4 sin 8 = 1 2 cos 12 + cos 4 sin 4 sin 8 = 1 2 cos 4 cos 12 Integrating both sides sin 4 sin 8 = 1 2 cos 4 cos 12 = +