The value of the sum of two vectors $\overrightarrow A $ and $\overrightarrow B $ with $\theta $ as the angle between them is
The value of the sum of two vectors $\overrightarrow A $ and $\overrightarrow B $ with $\theta $ as the angle between them is
$\sqrt {{A^2} + {B^2} + 2AB\cos \theta } $
$\sqrt {{A^2} - {B^2} + 2AB\cos \theta } $
$\sqrt {{A^2} + {B^2} - 2AB\sin \theta } $
$\sqrt {{A^2} + {B^2} + 2AB\sin \theta } $
The value of the sum of two vectors $\overrightarrow A $ and $\overrightarrow B $ with $\theta $ as the angle between them is
As we know,
Resultant of two vectors $\vec{A}$ and $\vec{B}$ is
$R =\sqrt{ A ^2+ B ^2+2 AB \cos \theta}$