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

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