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4-1.Complex numbers
normal
જો $z$ શુદ્ધ વાસ્તવિક સંખ્યા છે કે જેથી ${\mathop{\rm Re}\nolimits} (z) < 0$, તો $arg(z)$ = . . .. .
A
$\pi $
B
$\frac{\pi }{2}$
C
$0$
D
$ - \frac{\pi }{2}$
Solution
(a)Let $z = a + i0$, where $a < 0$. Then $z$ is represented by a point on negative side of $x$-axis, therefore $arg(z) = \pi $
Standard 11
Mathematics