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Three Dimensional Geometry EXERCISE 11.1 Solutions
- Q1: If a line makes angles $90^{\circ}$, $135^{\circ}$, $45^{\circ}$ with the $x$, $y$ and $z$-axes respectively, find its direction cosines.
- Q2: Find the direction cosines of a line which makes equal angles with the coordinate axes.
- Q3: If a line has the direction ratios $-18$, $12$, $-4$, then what are its direction cosines ?
- Q4: Show that the points $(2, 3, 4)$, $(-1, -2, 1)$, $(5, 8, 7)$ are collinear.
- Q5: Find the direction cosines of the sides of the triangle whose vertices are $(3, 5, – 4)$, $(– 1, 1, 2)$ and $(– 5, – 5, – 2)$.
Other Exercises for CBSE - Class 12 Mathematics Three Dimensional Geometry
Chapters in CBSE - Class 12 Mathematics
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Mubaraknagar, Nizamabad 
10 yrs of Exp 
4 students 
91 hrs of classes completed 
650 per hour 
Online Classes 
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