The magnitudes of vectors $\vec A,\,\vec B$ and $\vec C$ are $3, 4$ and $5$ units respectively. If $\vec A + \vec B = \vec C$, the angle between $\vec A$ and $\vec B$ is
The magnitudes of vectors $\vec A,\,\vec B$ and $\vec C$ are $3, 4$ and $5$ units respectively. If $\vec A + \vec B = \vec C$, the angle between $\vec A$ and $\vec B$ is
$\frac{\pi }{2}$
${\cos ^{ - 1}}(0.6)$
${\tan ^{ - 1}}\left( {\frac{7}{5}} \right)$
$\frac{\pi }{4}$
The magnitudes of vectors $\vec A,\,\vec B$ and $\vec C$ are $3, 4$ and $5$ units respectively. If $\vec A + \vec B = \vec C$, the angle between $\vec A$ and $\vec B$ is
$C = \sqrt {{A^2} + {B^2}} $
=$\sqrt {{3^2} + {4^2}} = 5$
$\therefore $ Angle between $\overrightarrow A $ and $\overrightarrow B $ is $\frac{\pi }{2}$
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