When the axes are rotated through an angle 90° the equation 5x – 2y + 7 = 0 transforms to `(A) 2X - 5Y+7=0 (B) 2X + 5Y - 7 = 0 (C) 2x - 5Y – 7=0 (D) 2X + 5Y +7= 0`

When the axes rotated through an angle 90^(0) .The equation 5x-2y+7=0 transforms to pX+qY+r=0 Then 2p+q+r=

Find measure of an angle between the lines x + y = 3 and 2x + 5y - 7 = 0.

The orthocentre of the triangle formed by the lines x - 7y + 6 = 0, 2x - 5y - 6 = 0 and 7x + y - 8 = 0 is

When the origin is shifted to (-2,-3) and the axes are rotated through an angle 45^(0) , find the transformed equation of 2x^(2)+4xy-5y^(2)+20x-22y-14 = 0 .

Two consecutive sides of a parallelogram are 4x+5y=0a d n7x+2y=0. If the equation of one diagonal is 11 x+7y=9, Equation of other diagonal : (A) 11x + 7y =0 (B) 3x - 5y + 5 = 0 (C) 7x + 11y = 0 (D) 3x + 5y + 5 =0

Two consecutive sides of a parallelogram are 4x+5y=0 and 7x+2y=0. If the equation of one diagonal is 11 x+7y=9, Equation of other diagonal : (A) 11x + 7y =0 (B) 3x - 5y + 5 = 0 (C) 7x + 11y = 0 (D) x-y =0

(i) 7x^(2) + 16x - 15 = 0 (ii) 5y^(2)+ 8y - 21 = 0

I. 5x^(2) + 2x - 3 = 0" "II. 2y^(2) + 7y + 6 = 0

Write the angle between the planes 3x -5y + 2z-8 = 0 and 2x + 4y + 7z + 16 = 0.