question_answer

If \[\hat{a}\]and \[\hat{b}\] are unit vectors such that \[[\hat{a},\hat{b},\hat{a}\times \hat{b}]=\frac{1}{4},\] then angle between \[\hat{a}\] and \[\hat{b}\] is.

A)  \[\frac{\pi }{3}\]                                   

B)  \[\frac{\pi }{4}\]

C)  \[\frac{\pi }{6}\]           

D)  \[\frac{\pi }{2}\] 

E)  None of these