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