Question

please answer my question ​

Answer 1

Explanation:

Given that ..

magnitude of A+B vectors =magnitude of A vector=magnitude of B vector=say x.

Let the angle is a.

so ..

lA+Bl^2 = lal^2 + lBl^2 +2|A||Bl cosa

or..

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

or

cos a=-1/2

or

a=120°

Answer 2

Answer:

I don't know please I am sorry