Find the equation of the straight line joining the points: (2,3),(2,-4).

Find the equation of the st. line joining the points (3, -1) and (2, 3). Also find the equation of another st. line perpendicular to this st. line and passing through (5, 2).

Find the equation of the straight line joining the points (a cos theta_1 a sin theta_1) and (a cos theta_2, a sin theta_2) .

Find the equation of the straight line passing through the point (2,3) and through the point of intersection of the lines 2x-3y+7=0 and 7x+4y+2=0

Find the equation of the line joining the points A(0,-1,3) and B(2,-3,-1).

Find the equation of the straight line through two points : (2, 6) and (2, 5).

Find the equations of the straight lines joining the origin to the points of intersection of x^2+y^2-4x-2y=4 and x^2+y^2-2x-4y=4 .

Find the equation of the straight line through two points : (0, 2) and (0,4).

Find the equation to the pair of straight lines joining the origin to the intersections of the straight line y=mx + c and the curve x^2 + y^2=a^2 . Prove that they are at right angles if 2c^2=a^2(1+m^2) .

Find the projection of the line segment joining the points: (2,-3,0), (0,4,5) on the line with direction cosines

Find the projection of the line segment joining the points (1,2,3), (4,3,1) on the line with direction ratios lt3,-6,2gt .