E
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Sep 18, 2022
$x,y>0, if z=(x,-y)$ then Arg z =
Difficulty: Hard
A:
$-\tan^{-1}\frac{y}{x}$
B:
$\tan^{-1}\frac{y}{x}$
C:
$\pi -\tan^{-1}\frac{y}{x}$
D:
$\pi +\tan^{-1}\frac{y}{x}$
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