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If cos(theta-alpha) = a and cos(theta-be...

If `cos(theta-alpha) = a` and `cos(theta-beta) = b` then the value of `sin^2(alpha-beta) + 2ab cos(alpha-beta)`

A

`a^(2)+b^(2)`

B

`a^(2)-b^(2)`

C

`b^(2)-a^(2)`

D

`-a^(2)-b^(2)`

Text Solution

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The correct Answer is:
A
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