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IF tan alpha = ( sin alpha - cos alp...

IF ` tan alpha = ( sin alpha - cos alpha )/( sin alpha + cos alpha)` , then ` sin alpha + cos alpha` is

A

`+- cos alpha `

B

`+- sqrt(2) cos alpha `

C

` +- sqrt(2) sin alpha `

D

`+- sin alpha `

Text Solution

Verified by Experts

The correct Answer is:
B
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