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If the foot of perpendicular from the or...

If the foot of perpendicular from the origin to a straight line is at the point (3,-4). Then the equation of the line is

A

3x – 4y = 25

B

3x – 4y + 25 = 0

C

4x + 3y - 25 = 0

D

4x + 3y + 25 = 0

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The correct Answer is:
A
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NEW JOYTHI PUBLICATION-STRAIGHT LINES-EXERCISE
  1. A (-5,0) and B (3,0) are two of the verti- ces of a triangle ABC. Its...

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  2. The ratio in which the line 3x+4y+2 = 0 divides the distance between...

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  3. If the foot of perpendicular from the origin to a straight line is at...

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  4. A rectangle has two opposite vertices at (1, 2) and (5,5). If the oth...

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  5. If the lines ax + 2y + 1 = 0, bx + 3y + 1 = 0, cx + 4y + 1 = 0 are co...

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  6. The distance of the point (3, 5) from the line 2x + 3y - 14 = 0 measu...

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  7. A straight line through the point (2, 2) intersects the lines sqrt3 x...

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  8. If the extremities of the base of an isosce- les triangle are the poi...

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  9. The equation of the line passing through the intersection of x - sqrt...

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  10. The equations of the lines through (-1,-1) and making angles 45^(@) w...

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  11. If the vertices of a diagonal of a square (-2, 4) and (-2, 2) then it...

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  12. The orthocentre of the triangle formed by the lines x = 0, y = 0 and ...

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  13. The foot of the perpendicular from the point (3,4) on the line 3x – 4...

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  14. The coordinates of the image of the origin O w.r.t the line x + y + 1...

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  15. The incentre of the triangle with vertices (1, sqrt3) (0,0) (2,0) is

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  16. The angle between the lines 2x - y+3 = 0 and x + 2y + 3 = 0 is

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  17. Distance between the lines 5x + 3y-7 = 0 and 15x +9y + 14 = 0 is

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  18. The equation of the straight line passing through the point (4, 3) an...

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  19. The third vertex of an equilateral triangle whose vertices are (2, 4),...

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  20. The area enclosed by the curve |x| + |y| = 1 is

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