I have a couple questions regarding Euler's formula. First I'm confused about the notation e(adsbygoogle = window.adsbygoogle || []).push({}); ^{i[tex]\vartheta[/tex]}. To me the notation implies that we are raising e to the exponentimultiplied by [tex]\vartheta[/tex]. Is this correct? If so, how would you do that? Also, my second question regards the second part of that equation: cos[tex]\vartheta[/tex] +isin[tex]\vartheta[/tex]. That makes sense to me, but sometimes I see it written as cosx +isinx. I don't understand what that means. What would be the cosine or sine of x?

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# Need help understanding Euler's formula (complex numbers)

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