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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.
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