1.

If the tangents of the angles A and B of triangle ABC satisfy the equation abx^(2)-c^(2)x+ab=0, then

Answer»

`tanA=a//B`
`tanB=b//a`
`cocS=0`
`SIN^(2)A+sin^(2)B+sin^(2)C=2`

ANSWER :A::B::D


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