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यदि s = cos^(2) alpha + cos^(2) beta है,...

यदि `s = cos^(2) alpha + cos^(2) beta` है, तो `cos (alpha + beta) cos (alpha - beta)` का 's' के पदों में मान है

A

s - 1

B

`(s - 1)/(s)`

C

`s^(2)`

D

1 - s

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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