Math, asked by anukulajohn, 4 months ago

cosA.cos (60 + A).cos (60 - A) =1/4
cos 3A and hence deduce that cos20.cos40.cos60.cos80=1/16

Answers

Answered by arabdulrahman26946

1

A0 - A) =1/4

cos 3A and hence dedunswer:

Step-by-step explanation:

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