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The value of sin^2 alpha cos^2 beta + co...

The value of `sin^2 alpha cos^2 beta + cos^2 alpha sin^2 beta + sin^2 alpha sin^2 beta +cos^2 alpha cos^2 beta` is

A

1

B

0

C

`-1`

D

3

Text Solution

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The correct Answer is:
A
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