4-1.Complex numbers
easy

सम्मिश्र संख्या $ - 1 + i\sqrt 3 $ का कोणांक ............ $^\circ$ है

A

$-60$

B

$60$

C

$120$

D

$-120$

Solution

(c) $arg( – 1 + i\sqrt 3 ) = {\tan ^{ – 1}}\left( {\frac{{\sqrt 3 }}{{ – 1}}} \right) = {120^o}$

क्योंकि यह द्वितीय चतुर्थाश में स्थित है

Standard 11
Mathematics

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