Question

The magnitudes of vectors A,B and C are 3,4 and 5 units respectively. If A+B=C, the angle between A and B is____?

Answer 1

Answer:

$\frac{\pi}{2}$

Explanation:

using

formula

${c}^{2} = {a}^{2} + {b}^{2} +2 cos( \alpha )$

${c }^{2} = {a}^{2} + {b}^{2}$

if

$\cos( \alpha ) = 0$

therefore

$\alpha = \frac{\pi}{2}$

or 90degree

if u like the way of answering make it brilliantly answer