Let a be a unit vector perpendicular to unit vectors b and c and if the angle between b and c be then b c is

JEE Advanced Mathematics question

Let be a unit vector perpendicular to unit vectors and and if the angle between and be then is

Answer: (C)

is perpendicular to both and , so it is parallel to , and \vec{b}\vec{c}\vec{b}\vec{c}\sin$α =

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Question ID VK-109647