Imaginary numbers aren't imaginary
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Waves Explained (in Music and Physics)
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Where does “e” come from?
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A Proof That The Square Root of Two Is Irrational
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Raiz quadrada de um número imaginário
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The best A – A ≠ 0 paradox
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The Most Beautiful Equation (Euler's Formula)
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23% Beyond the Riemann Hypothesis - Numberphile
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