Angle between Two Lines

Author:NCERT
12th Uttar Pradesh Board
IMPORTANT

Angle between Two Lines: Overview

In this topic, we will learn to find the angle between two lines, either in vector form or Cartesian form. Conditions for perpendicularity and parallelism for both vectors and the Cartesian system are also elucidated here.

Important Questions on Angle between Two Lines

EASY
IMPORTANT

In the following case, find the distance of the given point from the corresponding given plane.
Point                                        Plane

-6,0,0                          2x-3y+6z-2=0

EASY
IMPORTANT

In the following case, find the distance of the given point from the corresponding given plane.
Point                                        Plane

2,3,-5                        x+2y-2z=9

EASY
IMPORTANT

In the following case, find the distance of the given point from the corresponding given plane.
Point                                        Plane

3,-2,1                         2x-y+2z+3=0

MEDIUM
IMPORTANT

Find the distance of the given point from the corresponding given plane.
Point                                        Plane
0,0,0                      3x-4y+12z=3

MEDIUM
IMPORTANT

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angles between them.
4x+8y+z-8=0 and y+z-4=0

EASY
IMPORTANT

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angles between them.
2x-y+3z-1=0 and 2x-y+3z+3=0

EASY
IMPORTANT

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them.
 2x-2y+4z+5=0 and 3x-3y+6z-1=0

EASY
IMPORTANT

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them.
2x+y+3z-2=0 and x-2y+5=0

MEDIUM
IMPORTANT

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them.
7x+5y+6z+30=0 and 3x-y-10z+4=0

MEDIUM
IMPORTANT

Find the angle between the planes whose vector equations are
r·(2i^+2j^-3k^)=5 and r·(3i^-3j^+5k^)=3

MEDIUM
IMPORTANT

Find the equation of the plane through the line of intersection of the planes x+y+z=1 and 2x+3y+4z=5 which is perpendicular to the plane x-y+z=0.

HARD
IMPORTANT

Find the vector equation of the plane passing through the intersection of the planes r·2i^+2j^-3k^=7,r·2i^+5j^+3k^=9 and through the point 2,1,3.

EASY
IMPORTANT

Find the equation of the plane through the intersection of the planes 3x-y+2z-4=0 and x+y+z-2=0 and the point 2,2,1.

MEDIUM
IMPORTANT

Find the equation of the plane with intercept 3 on the y-axis and parallel to ZOX plane.

MEDIUM
IMPORTANT

Find the intercepts cut off by the plane 2x+y-z=5

MEDIUM
IMPORTANT

Find the equation of the plane that passes through three points.
1,1,0,1,2,1,-2,2,-1

MEDIUM
IMPORTANT

Find the equations of the planes that passes through three points.
1,1,-1,6,4,-5,-4,-2,3

MEDIUM
IMPORTANT

Find the vector and Cartesian equation of the planes that passes through the point 1,4,6 and the normal vector to the plane is i^-2j^+k^.

MEDIUM
IMPORTANT

Find the vector and Cartesian equation of the planes that passes through the point 1,0,-2 and the normal to the plane is i^+j^-k^.

MEDIUM
IMPORTANT

Find the coordinates of the foot of the perpendicular drawn from the origin 5y+8=0.