Class 12MathematicsTHREE DIMENSIONAL GEOMETRYSystem of co-ordinates, Direction cosines and direction ratios, Projection
EasyAll the points on the $x$-axis have
- A$x = 0$
- B$y = 0$
- C$x = 0, y = 0$
- D$y = 0, z = 0$
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Similar Questions
If the relation between the direction ratios of two lines in $\mathbb{R}^3$ are given by $l+m+n=0$ and $2lm+2mn-ln=0$, then the angle between the lines is ($l, m, n$ have their usual meaning).
If the direction cosines of a line are $\frac{1}{c}, \frac{1}{c}, \frac{1}{c}$,then:
The direction cosines of the line passing through $P(2, 3, -1)$ and the origin $O(0, 0, 0)$ are:
If a line makes angles $\alpha, \beta, \gamma$ with the coordinate axes,then $\cos 2\alpha + \cos 2\beta + \cos 2\gamma = \dots$
Medium
View SolutionIf the direction ratios of a line are $1, -3, 2$,what are its direction cosines?
Easy
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