Question

Two vectors A, and A, are making an angle of 90 with each other. What is
their resultant magnitude​

Answer 1

Explanation:

Resultant would be

$\sqrt{ a { }^{2} + \: b {}^{2} \: + 2ab \cos( \alpha)}$

Here a = b and alpha = 90°

So, ( a² + a² + 2a²cos90° )½

= (2a²)½

= a√2

Thanks.