Find the equation of the straight line joining the points: (2,3),(4,1).

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 line containing the points (1,2), (3,8)

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

The point P is the intersection of the straight line joining the points Q(2,3,5) and R(1,-1,4) with the plane 5x-4y-z=1 . If S is the foot of the perpendicular drawn from the point T(2,1,4) to QR, then the length of the line segment PS is:

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

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 .

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

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