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The sides of a triangle are sinalpha,cos...

The sides of a triangle are `sinalpha,cosalpha` and `sqrt(1+sinalphacosalpha)` for some `0 lt alpha lt (pi)/(2)`. The the greatest angle of the triangle is

A

`60^(@)`

B

`90^(@)`

C

`120^(@)`

D

`150^(@)`

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The correct Answer is:
C
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