A) \[\pi \]
B) 2\[\pi \]/3
C) \[\pi \]/2
D) zero
Correct Answer: D
Solution :
\[{{A}^{2}}={{A}^{2}}+{{A}^{2}}+2{{A}^{2}}cos\theta \] \[\Rightarrow \] \[\cos \theta =\frac{1}{2}\] \[\theta =\frac{2\pi }{3}\]You need to login to perform this action.
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