Three Dimensional Geometry Question - CBSE

Question

Angle between $x$-axis and the line with direction cosines $\left(\dfrac{1}{2}, \dfrac{1}{2}, \dfrac{1}{\sqrt{2}}\right)$ is:
(a) $\dfrac{\pi}{3}$
(b) $\dfrac{\pi}{4}$
(c) $\dfrac{\pi}{6}$
(d) $\dfrac{\pi}{2}$

Accepted Answer

$\cos heta = 1/2 \Rightarrow heta = \pi/3$. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Evaluating angle $ heta = \pi/3$: 1.0 Mark

Question:

Step-by-Step Solution

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