Question

Two unit vectors are inclined at 90° then the magnitude of resultant is

Answer 1

Answer:

This is a kind of fact. When you solve questions up ahead. You simply use the value √2 for two unit vectors at 90°. Just to save your time we avoid going through calculations everytime.

Similarly Magnitude of 3 unit vectors is √3 (√(i)² +(j)²+ (k)²). However the angle between them in such a case can be calculated be Direction Cosines.