Question

Please explain the answer!

Answer 1

Answer:the answer will be zero

Explanation: we know scalar product of two vectors is given by

a.b= ab Cos( theta)......(1)

Here since the two vectors are unit vectors, a= b= 1

And since these two vectors are perpendicular to each other, the angle subtended between them is 90°.

Therefore (theta) =90°

And Cos 90°= 0

Therefore, a.b= abCos 90° =0