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  ANSI Common Lisp   12 Numbers   12.2 Dictionary of Numbers

12.2.20 sin, cos, tan Function

sin radians    number

cos radians    number

tan radians    number

Arguments and Values:
radians - a number given in radians.

number - a number.

sin, cos, and tan return the sine, cosine, and tangent, respectively, of radians.

 (sin 0)  0.0
 (cos 0.7853982)  0.707107
 (tan #c(0 1))  #C(0.0 0.761594)

Exceptional Situations:
Should signal an error of type type-error if radians is not a number. Might signal arithmetic-error.

See Also:
asin, acos, atan, Section Rule of Float Substitutability

Allegro CL Implementation Details:

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