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The combined equation of the lines L1and...

The combined equation of the lines `L_1`and `L_2` is `2x^2+6xy+y^2=0`, and that of the lines `L_3` and `L_4` is `4x^2+18xy+y^2=0`. If the angle between `L_1` and `L_4` be `alpha` , then the angle between `L_2 and L_3` will be .

A

`(pi)/(2)-alpha`

B

`(pi)/(4)+alpha`

C

`alpha`

D

`2alpha`

Text Solution

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The correct Answer is:
c
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