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The angle between the lines sin^(2) alph...

The angle between the lines `sin^(2) alpha.y^(2) -2xy.cos^(2) alpha + (cos^(2) alpha -1)x^(2) =0` is

A

`90^(@)`

B

`alpha`

C

`(alpha)/(2)`

D

`2 alpha`

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The correct Answer is:
A
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