Ex 7.3, 7 - Integrate sin 4x sin 8x - Chapter 7 Class 12 - Ex 7.3

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  1. Chapter 7 Class 12 Integrals
  2. Serial order wise

Transcript

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 = +

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.