Question

Modulus of A and B vector square=​

Answer 1

Explanation:

vector * b vector = |a|.|b|.sin(X)

X is the angle between a vector and b vector.

In the same way, dot product of two vectors,

a vector . b vector = |a|.|b|.cos(X)

(a vector * b vector)^2 + (a vector . b vector)^2

= (|a|^2)(|b|^2)

{ As sin^(X) + cos(X)^2 = 1 }