12th Class
Mathematics
Sample Paper
Maths Olympiad Model Paper-4
question_answer
let \[\overrightarrow{a},\]\[\overrightarrow{b}\]and \[\overrightarrow{c}\] be three unit vectors such that \[\overrightarrow{a}\times (\overrightarrow{b}\times \overrightarrow{c})=\frac{\sqrt{3}}{2}(\overrightarrow{b}+\overrightarrow{c}).\] If \[\overrightarrow{b}\] is not parallel to \[\overrightarrow{c}\]then the angles between \[\overrightarrow{a}\]and \[\overrightarrow{b}\] is