e ^ (ix) 在 Does Euler's formula give $e^{-ix}=\cos(x) -i\sin(x) - Math ... 的評價 e ix=cos(x)+isin(x). e−ix=cos(x)−isin(x). To get from (1) to (2), you just replace x with −x. You get the − in front because sin(−x)=−sin(x), ... ... <看更多>
