Home
Class 12
MATHS
The direction cosines l, m and n of two ...

The direction cosines l, m and n of two lines are connected by
the relations `l+m+n=0` and `lm=0`, then the angle between the lines is

A

(a) `(pi)/(3)`

B

(b) `(pi)/(4)`

C

(c) `(pi)/(2)`

D

(d) `0`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Angle between the pair of lines xy=0 is

Measure of angle between the lines 3xy-4y=0 is

If the direction cosines of a line are k,(1)/(2),0 then k =

The valid direction angle triple of a line L is

If the direction cosines of two lines are l_(1), m_(1), n_(1) and l_(2), m_(2), n_(2) , then find the direction cosine of a line perpendicular to these lines. a) l_(1)+l_(2),m_(1)+m_(2),n_(1)+n_(2) b) l_(1)-l_(2),m_(1)-m_(2),n_(1)-n_(2) c) m_(1)n_(2)-m_(2)n_(1),n_(1)l_(2)-n_(2)l_(1),l_(1)m_(2)-l_(2)m_(1) d) l_(1)+2l_(2),m_(1)+2m_(2),n_(1)+2n_(2)

If l, m, n are direction cosines of a line, then the maximum value of lm+mn+nl is

If l,m,n are direction cosines of the line then -l,-m,-n can be: a) only direction ratios of the line b) only direction cosines of the line c) direction cosines and direction ratios of the line d) neither direction cosines nor direction ratios of the line

In the figure, some points on lines l, t and n are given. Find the slopes of those lines. Observe the type of angles made by these lines with the positive direction of X-axis and try to find a relation between the type of angle and sign of the slope.

The angle between the lines whose direction cosines satisfy the equations l+m+n=""0 and l^2=m^2+n^2 is