If the lines represented by the equation...

If the lines represented by the equation `2x^2-3xy+y^2=0` make angles `alpha` and `beta` with X-axis, then `cot^2alpha+cot^2beta` is equal to

A

0

B

`3/2`

C

`7/4`

D

`5/4`

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The correct Answer is:

D

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