Math, asked by khaard456, 3 months ago

Q1 Prove that cos 20 cos 40 cos 60 cos 80 *=1/16 = sin10 sin 30 sin 50 sin 70

Answers

Answered by starboiiii

1

Answer:

L.H.S. = cos 20°.cos40°.cos60°.cos80°

= cos60°.cos80°.cos40°.cos60°

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