A) \[\frac{1}{3}\]
B) \[\frac{1}{2}\]
C) \[\frac{1}{\sqrt{3}}\]
D) \[\frac{1}{\sqrt{2}}\]
Correct Answer: C
Solution :
Here, \[\cos \alpha =\cos \beta =\cos \gamma \] \[\therefore \] \[3\,{{\cos }^{2}}\alpha =1\,\,\Rightarrow \,\,\alpha ={{\cos }^{-1}}\left( \pm \frac{1}{\sqrt{3}} \right)\].You need to login to perform this action.
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