Three Dimensional Geometry Question - CBSE

Question

The angle between lines with direction ratios $1, 1, 2$ and $\sqrt{3}-1, -\sqrt{3}-1, 4$ is:
(a) $\dfrac{\pi}{3}$
(b) $\dfrac{\pi}{4}$
(c) $\dfrac{\pi}{6}$
(d) $\dfrac{\pi}{2}$

Accepted Answer

$\cos heta = 6/12 = 1/2 \Rightarrow heta = \pi/3$. [1.0 Mark]

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

Question:

Step-by-Step Solution

Master Three Dimensional Geometry with Mathbee