Let a =2 i + j -2 k and b = i + j . If c is a vector such that a c =| c |, | c - a |=2 2 and the angle...

Question

Let a =2 i + j -2 k and b = i + j . If c is a vector such that a c =| c |, | c - a |=2 2 and the angle between ( a b ) and c is 6 , then the value of |( a b ) c | is -

Accepted Answer

(C)

JEE Main 2021 Mathematics question

Solution