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$\frac{(\cos \alpha + i \sin \alpha)(\cos \beta + i \sin \beta)}{(\cos \gamma + i \sin \gamma)(\cos \delta + i \sin \delta)}$ का मान ज्ञात कीजिए।

$\left( \frac{1}{1 - 2i} + \frac{3}{1 + i} \right) \left( \frac{3 + 4i}{2 - 4i} \right) = $

यदि $-3+ix^2y$ और $x^2+y+4i$ सम्मिश्र संयुग्मी (complex conjugates) हैं,तो $x=$

मान ज्ञात कीजिए: $\left[i^{18}+\left(\frac{1}{i}\right)^{25}\right]^{3}$.

यदि $\frac{3+2i}{1+i} = \frac{1}{2}(x+iy)$ है,तो $x-y =$

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