Three Dimensional Geometry Question 233
Question: The angle between the pair of lines with direction ratios (1, 1, 2) and $ (\sqrt{3}-1,-\sqrt{3}-1,4) $ is
[MP PET 1997, 2000]
Options:
A) $ 30{}^\circ $
B) $ 45{}^\circ $
C) $ 60{}^\circ $
D) $ 90{}^\circ $
Show Answer
Answer:
Correct Answer: C
Solution:
$ \cos \theta =\frac{1,(\sqrt{3}-1)-1,(\sqrt{3}+1)+2\times 4}{\sqrt{6},\sqrt{24}}=\frac{6}{12}\Rightarrow \theta =60^{o} $ .
BETA
