4-1.Complex numbers
easy

$\frac{{1 + 2i}}{{1 - {{(1 - i)}^2}}}$ का कोणांक और मापांक है         

A

$\sqrt 2$ और $\frac{\pi }{6}$

B

$1$ और $0$

C

$1$ और $\frac{\pi }{3}$

D

$1$ और $\frac{\pi }{4}$

Solution

(b) $\frac{{1 + 2i}}{{1 – {{(1 – i)}^2}}} = \frac{{1 + 2i}}{{1 – (1 – 1 – 2i)}} = \frac{{1 + 2i}}{{1 + 2i}} = 1 + 0i$

मापांक $=1$

कोणांक $\theta $=${\tan ^{ – 1}}\frac{0}{1} = 0$.

Standard 11
Mathematics

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