Revision|Slope of a Line#!#Angle between Two Lines

Slopes of Lines

Introduction to co-ordinate geometry | Inclination and slope of a line | Angle between two lines and locus

Distance and Angle between Two Lines

Angles between two lines alpha-beta

Find the angles between two lines.

Angle between Lines and Planes

Angle between line if relation between direction cosine is given :: Refer-Angle Between Two Lines

Angle between line and plane

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

If m_(1),m_(2) are the slopes of two lines and theta is the angle between two lines then tan theta =