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The number of ordered pairs (alpha, beta...

The number of ordered pairs `(alpha, beta)` where `alpha, beta in (-pi, pi)` satisfying `cos (alpha-beta)=1` and `cos (alpha+beta)=1/e` is

A

0

B

1

C

2

D

4

Text Solution

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
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