A) \[{{\cos }^{-1}}\frac{5}{12}\]
B) \[{{\cos }^{-1}}\frac{5}{13}\]
C) \[{{\cos }^{-1}}\frac{12}{13}\]
D) \[{{\cos }^{-1}}\frac{7}{13}\]
Correct Answer: C
Solution :
\[|\vec{P}|\ =\ 5\], \[|\vec{Q}|\ =12\] and \[|\vec{R}|\ =13\] \[\cos \theta =\frac{Q}{R}=\frac{12}{13}\] \ \[\theta ={{\cos }^{-1}}\left( \frac{12}{13} \right)\]You need to login to perform this action.
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