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If sin A , sin B are roots of c^(2) x^...

If sin A , sin B are roots of ` c^(2) x^(2) - c ( a+b) x + ab = 0 , ` then the `Delta ` le is

A

the triangle is acute angled

B

the triangle is obluse angled

C

`sin C=(sqrt(3))/(2)`

D

`sin A + cos A = (a+b)/(c)`

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The correct Answer is:
D
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