If the pair of lines 3x^(2)+14xy+8y^(2)=...

If the pair of lines `3x^(2)+14xy+8y^(2)=0` and `2x^(2)+5xy-12y^(2)=0` have a common line then angle between other two lines is

A

`pi//2`

B

`pi//6`

C

`pi//4`

D

`pi//3`

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The correct Answer is:

A

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