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The sides of a triangle are sin alp...

The sides of a triangle are ` sin alpha , cos alpha and sqrt( 1+ sin alpha cos alpha )` for some` 0 lt alpha lt pi/2` then the greater angle of the triangle is

A

`120^@`

B

`90^@`

C

`60^@`

D

`150^@`

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The correct Answer is:
A
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