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Three Dimensional Geometry
Question
If a line has the direction ratios – 18, 12, – 4. then what are its direction cosines?
Solution
Direction ratios of the line are – 18, 12, –4
Dividing each by
the direction cosines of the line are 
Dividing each by
the direction cosines of the line are
Some More Questions From Three Dimensional Geometry Chapter
If α, β, γ are the angles which a line makes with the axes, prove that sin2α + sin2 β + sin2γ = 2.
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Mock Test Series
Mock Test Series