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WebSep 29, 2023 · e (a + b i) = e a (cos b + i sin b) e^{(a+bi)}=e^a(\cos b+i\sin b) e (a + bi) = e a (cos b + i sin b) であったから,a = 0 a=0 a = 0 とすればオイラーの公式: e i θ = cos θ + i sin θ e^{i\theta}=\cos\theta+i\sin\theta e i θ = cos θ +
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