Complex Numbers And Quadratic Equations question 92
Question: The argument of the complex number $ -1+i\sqrt{3} $ is [MP PET 1994]
Options:
A) $ -60^{o} $
B) $ 60^{o} $
C) $ 120^{o} $
D) $ -120^{o} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ arg(-1+i\sqrt{3})={{\tan }^{-1}}( \frac{\sqrt{3}}{-1} )=120^{o} $ because it lies in second quadrant.
BETA
