Questions
Any numbers which are proportional to the direction cosines of a line, are called
a
Direction sines
b
Direction ratios
c
Direction angles
d
Direction tangents
detailed solution
Correct option is B
The Ordered triad which are proportional to the direction cosines of a line are called direction ratios. There are infinite sets of direction ratios but there is only two sets of direction cosines to any line.Talk to our academic expert!
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If is an angle given by where are the angles made by a line with the axes respectively then the value of is
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