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सम्मिश्र संख्या $(-5-12i)$ के वर्गमूल ज्ञात कीजिए।

यदि $\tanh^{-1}(x+iy) = \frac{1}{2} \tanh^{-1}\left(\frac{2x}{1+x^2+y^2}\right) + \frac{i}{2} \tan^{-1}\left(\frac{2y}{1-x^2-y^2}\right)$,जहाँ $x, y \in \mathbb{R}$,तो $\tanh^{-1}(iy) =$

$\sqrt{12-\sqrt{68+48 \sqrt{2}}}$ का मान ज्ञात कीजिए :

यदि $\theta = \frac{\pi}{12}$ और $x = \log \left(\cot \left(\frac{\pi}{4} + \theta\right)\right)$ है,तो $\cosh x =$

सम्मिश्र संख्या $z=1+i \sqrt{3}$ को ध्रुवीय रूप में निरूपित कीजिए।

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