If 
and 
are direction cosines of the two lines inclined to each other at an angle 
then the direction cosines of the external bisector of the angle between the lines are
a)
b)
c)
d)
If and are direction cosines of the two lines inclined to each other at an angle then the direction cosines of the external bisector of the angle between the lines are
a)
b)
c)
d)
Question ID - 55747 | SaraNextGen Top Answer
If and are direction cosines of the two lines inclined to each other at an angle then the direction cosines of the external bisector of the angle between the lines are
a)
b)
c)
d)
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If |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (c) -
(c)
.png)
In Fig. 
is the external bisector
The co-ordinates of 
are 
Therefore, direction ratios of 
are proportional to
127 votes
Answer Link
127