
Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Ex 7.3
Ex 7.3, 2
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Ex 7.3, 7 You are here
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Ex 7.3, 23 (MCQ)
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Last updated at May 29, 2023 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 = +