A) \[\frac{\pi }{3}\]
B) \[\frac{\pi }{4}\]
C) \[\frac{\pi }{5}\]
D) \[\frac{\pi }{6}\]
Correct Answer: B
Solution :
\[arg\left( \frac{13-5i}{4-9i} \right)=arg(13-5i)-arg(4-9i)\] \[=-{{\tan }^{-1}}\left( \frac{5}{13} \right)+{{\tan }^{-1}}\frac{9}{4}=\frac{\pi }{4}\]You need to login to perform this action.
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