Let a , b and c be three vectors such that | a |= 3 , | b |=5, b c =10 and the angle between b and c is 3 ....

Question

Let a , b and c be three vectors such that | a |= 3 , | b |=5, b c =10 and the angle between b and c is 3 . If a is perpendicular to the vector b c , then | a ( b c )| is equal to _______.

Accepted Answer

30

JEE Main 2020 Mathematics question

Solution