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cis (Function)

Syntax:
— Function: cis radians → number
Arguments and Values:

radians—a real.

number—a complex.

Description:

cis returns the value of e^i· 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)