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If x cos alpha+cos beta-cos(alpha+beta) ...

If `x cos alpha+cos beta-cos(alpha+beta)` and `y=4 sin.(alpha)/(2)sin.(beta)/(2)cos.((alpha+beta)/(2))`, then (x-y) equals

A

0

B

1

C

-1

D

-2

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The correct Answer is:
A
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RESONANCE ENGLISH-DPP-QUESTION
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