- #1

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Does not [tex] \exp^{\frac{\pi \iota}{4}}=\cos\frac{\pi}{4} + \sin\frac{\pi}{4} = \frac{1}{\sqrt{2}} +\frac{\iota}{\sqrt{2}} \ \mbox{ which is not =} \ \sqrt{\iota} \\[/tex]

I find it hard to see that it equals [tex] \exp^{\frac{\pi \iota}{4}}\\[/tex]. Help would be welcome. Thanks.