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The expression cos^(2)(alpha+beta)+cos^(...

The expression `cos^(2)(alpha+beta)+cos^(2)(alpha-beta)-cos2alpha cos2beta`, is

A

`-1`

B

2

C

independent of `alpha` and `beta`

D

dependent on `alpha` and `beta`

Text Solution

Verified by Experts

The correct Answer is:
C
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