Math, asked by iamsweptyy, 1 year ago

Prove that 2 cos(x) cos(y) = cos(x + y) + cos(x − y).

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Answered by Lipsa133

0

Step-by-step explanation:

hope this will help you please mark me as brainlist...

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Answered by MERCTROOPER

0

Step-by-step explanation:

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

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