A) \[45{}^\circ \]
B) \[30{}^\circ \]
C) \[60{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: D
Solution :
\[\theta ={{\cos }^{-1}}\frac{(2+10-12)}{\sqrt{4+25+16}\sqrt{1+4+9}}\,={{\cos }^{-1}}(0)\] Þ \[\theta ={{90}^{o}}\].You need to login to perform this action.
You will be redirected in
3 sec