Question

Is i + J a unit vector explain with methmatical proof ?​

Answer 1

No I + j is not a unit vector if vector R = i + j

then

R =

$\sqrt{ {1}^{2} + {1}^{2} }$

R =

$\sqrt{2}$

then angle bita Which vector R make with x axis given by

$\cos( \beta ) = \frac{1}{ \sqrt{2} }$

Bita = 45°

Answer 2

Refer to attachment......✨