Cis (mathematics)


cis is a mathematical notation defined by cis x = cos x + i sin x, where cos is the cosine function, i is the imaginary unit and sin is the sine function. The notation is less commonly used than Euler's formula, eix, which offers an even shorter and more general notation for cos x + i sin x.


cis is a mathematical notation defined by cis x = cos x + i sin x, where cos is the cosine function, i is the imaginary unit and sin is the sine function. The notation is less commonly used than Euler's formula, eix, which offers an even shorter and more general notation for cos x + i sin x.
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