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Question Number 52240 by aghoelvis511@gmail.com last updated on 05/Jan/19
i=what in complex number.
$${i}={what}\:{in}\:{complex}\:{number}. \\ $$
Commented by Tawa1 last updated on 05/Jan/19
i  =  iota    i  =  cos (π/2) + i sin (π/2)  where    π = 180°
$$\boldsymbol{\mathrm{i}}\:\:=\:\:\boldsymbol{\mathrm{iota}} \\ $$$$ \\ $$$$\boldsymbol{\mathrm{i}}\:\:=\:\:\boldsymbol{\mathrm{cos}}\:\frac{\pi}{\mathrm{2}}\:+\:\boldsymbol{\mathrm{i}}\:\boldsymbol{\mathrm{sin}}\:\frac{\pi}{\mathrm{2}} \\ $$$$\mathrm{where}\:\:\:\:\pi\:=\:\mathrm{180}° \\ $$

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