A) \[0{}^\circ \]
B) \[\frac{\pi }{4}\]
C) \[\frac{\pi }{2}\]
D) \[\pi \]
Correct Answer: C
Solution :
\[{{13}^{2}}={{12}^{2}}+{{5}^{2}}+2\left( 12 \right)\left( 5 \right)cos\,\theta \] \[cos\,\theta \,\,=\,\,0\] \[\theta \,\,=\,\,90{}^\circ \]You need to login to perform this action.
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