Line Perpendicular to a given line.

Prove that through a given point, we can draw only one perpendicular to a given line.

Condition OF line being parallel || Perpendicular || Coincident || Line perpendicular to given line || Angle between two line when one is parallel to x & y axis

Finding the equations of tangent and normal parallel or perpendicular to a given line

How many lines can be drawn which are perpendicular to a given line and pass through a given point lying (i) outside it? (ii) on it?

Equation of line passing through a given point and perpendicular to given line

If l_(1), m_(1), n_(1) and l_(2), m_(2), n_(2) are the direction cosines of two lines and l , m, n are the direction cosines of a line perpendicular to the given two lines, then

Two lines perpendicular to the same line are ___ to each other.

Prove that two lines perpendicular to the same line are parallel to each other.

If (1,-2,-2) and (0,2,1) are the d.r's of two lines then the d.r's of a line perpendicular to both the lines are "