CLCS
Function

cis

cis radiansnumber

Arguments and Values

radiansa real.
numbera complex.

Description

cis returns the value of~e^i\cdot radians, which is a complex in which the real part is equal to the cosine of radians, and the imaginary part is equal to the sine of radians.

Examples

 (cis 0) ⇒  #C(1.0 0.0)