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The angle between the lines 4x-y+9=0, 25...

The angle between the lines `4x-y+9=0, 25x+15y+27=0` is

A

`pi//2`

B

`pi//4`

C

0

D

`pi//6`

Text Solution

Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-STRAIGHT LINES -EXERCISE 1B
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  12. If 2x+ky-10=0, 5x+2y-7=0 are parallel, then the value of k =

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  13. If 3x-ky-2=0, 2x+y+2=0 are perpendicular, then the value of k =

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