cis (original) (raw)

ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers

Syntax:

cis radians number

Arguments and Values:

radians - a real.

number - a complex.

Description:

cis returns the value of _ei· 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)

See Also:

Section 12.1.3.3 Rule of Float Substitutability

Allegro CL Implementation Details:

None.