A) 60°
B) Zero
C) 90°
D) None of these
Correct Answer: D
Solution :
\[\cos \theta =\frac{\overrightarrow{A}.\overrightarrow{B}}{|A||B|}=\frac{9+16+25}{\sqrt{9+16+25}\sqrt{9+16+25}}\]=\[\frac{50}{50}=1\] Þ\[\cos \theta =1\] \[\therefore \] \[\theta ={{\cos }^{-1}}(1)\]You need to login to perform this action.
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