Question

given that a=b . what is the angle between a vector +b vector and a vector -b vector​

Answer 1

Answer:

Ur answer

Explanation:

Given that

magnitude of a + b vector = magnitude of a vector =magnitude of b vector = say x

Let the angle is a

so

(a+b) ^2 = a^2 + b^2 + 2 ab cos a

or,

x^2 = x^2 + x^2 + 2x^2 2cosa

or,

cosa = -1/2

a 120

Answer 2

Answer:

Explanation:90 degree