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cos(A + B) cos (A-B) =...

`cos(A + B) cos (A-B) =`

A

`sin^(2)A - sin^(2)B`

B

`cos^(2)A - sin^(2) B`

C

`cos^(2)B - sin^(2) B`

D

`cos^(2)A - cos^(2) B`

Text Solution

Verified by Experts

The correct Answer is:
B
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