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spideyunlimited (3404)

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Olaaa!! Perrrfect answer. 568  [850 rates]

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7)

Euler's Equation states that

e^ i(pi) + 1 = 0

Thus,

e^ i(pi) = -1

So

i(pi) = ln(-1)

divide by 2:
i.pi/2 = 1/2 ln(-1)
ln ( -1)^1/2 = i . pi/2
ln i = i.90 degrees

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