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If sin alpha and cos alpha are the roots...

If `sin alpha and cos alpha` are the roots of the equation `ax^(2)-bx-1=0`, then find the relation between a and b.

A

`a^2+b^2+2ac=0`

B

`a^2-b^2+2ac=0`

C

`a^2+c^2+2ab=0`

D

`a^2-b^2-2ac=0`

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