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The sides of a triangle are sin alpha, c...

The sides of a triangle are `sin alpha, cos alpha and sqrt(1+ sin alpha cos alpha)` where` 0 lt alpha lt (pi)/(2).` Then the greatest angle of the triangle is-

A

`120^(@)`

B

`150^(@)`

C

`135^(@)`

D

`90^(@)`

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The correct Answer is:
A
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