Math, asked by vermaaakriti120, 9 months ago

Prove that cos36 cos42 cos 60 cos 78 = 1/16. Can we put the value of cos 36 directly?

Answers

Answered by writo

2

Step-by-step explanation:

use the formula first

cosA.Cos(60-A).Cos(60+A) = 1/4 cosA

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