A) \[\frac{1}{\sqrt{14}},\frac{-3}{\sqrt{14}},\frac{2}{\sqrt{14}}\]
B) \[\frac{1}{\sqrt{14}},\frac{2}{\sqrt{14}},\frac{3}{\sqrt{14}}\]
C) \[\frac{-1}{\sqrt{14}},\frac{3}{\sqrt{14}},\frac{-2}{\sqrt{14}}\]
D) \[\frac{-1}{\sqrt{14}},\frac{-2}{\sqrt{14}},\frac{-3}{\sqrt{14}}\]
Correct Answer: A
Solution :
For D'ratio (1, ? 3, 2), the direction cosine will be \[\left( \frac{1}{\sqrt{1+9+4}},\,\frac{-3}{\sqrt{1+9+4}},\,\frac{2}{\sqrt{1+9+4}} \right)\] \[\Rightarrow \,\,\left( \frac{1}{\sqrt{14}},\,\frac{-3}{\sqrt{14}},\,\frac{2}{\sqrt{14}} \right)\].
You need to login to perform this action.
You will be redirected in
3 sec
