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Find the value of k if the angle between...

Find the value of `k` if the angle between the straight lines `4x-y+7=0, kx-5y-9-0` is `45^(@)`

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The correct Answer is:
`(pi)/(4)`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-STRAIGHT LINE -TEXTUAL EXERCISES (EXERCISE-3(d))
  1. Find the value of k if the angle between the straight lines 4x-y+7=0, ...

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  2. Find the angle between the lines 3x+5y=7,2x-y+4=0

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  3. Find the angle between the lines y = -sqrt(3)x + 5, y = 1/(sqrt3) x - ...

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  4. Find the angle between the lines ax+by=a+b,a(x-y)+b(x+y)=2b

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  5. Find the length of the perpendicular drawn from the point given agains...

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  6. Find the length of the perpendicular drawn from the point given agains...

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  7. Find the length of the perpendicular drawn from the point given agains...

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  8. Find the distance between the parallel lines 3x-4y=12 and 3x-4y=7

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  9. Find the distance between the parallel to the lines 5x-3y-4=0,10x-6y-9...

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  10. Find the equation of the straight line parallel to the line 2x+3y+7=0 ...

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  11. Find the equation of the straight line perpendicular to the line 5x-3y...

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  12. Find the value of k if the straight lines 6x-10y+3=0 and kx-5y+8=0 are...

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  13. Find the value of p, if the straight lines 3x+7y-1=0 and 7x-py+3=0 are...

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  14. Find the value of k, if the straight lines y-3kx+4=0 and (2k-1)x-(8k-1...

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  15. (-4,5) is a vertex of a square and one of its diagonals is 7x-y+8=0. F...

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  16. Find the equation of the straight line passing through A(-1,3) and (i)...

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  17. The line x/a-y/b=1 meets the X-axis at P. Find the equation of the lin...

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  18. Find the equation of the line perpendicular to the line 3x+4y+6=0 and ...

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  19. A(-1,1),B(5,3) are opposite vertices of a square in the XY-plane. Find...

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  20. Find the foot of the perpendicular drawn from (4,1) upon the straight ...

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