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

જો $z = i \log (2 - \sqrt{3})$ હોય,તો $\cos z = $

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જો $\theta = \frac{\pi}{12}$ અને $x = \log \left(\cot \left(\frac{\pi}{4} + \theta\right)\right)$ હોય,તો $\cosh x =$

$2^{-i}$ ના મુખ્ય મૂલ્યનો વાસ્તવિક ભાગ છે

$(1 - i)^{-i}$ નો વાસ્તવિક ભાગ શોધો.

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