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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.20 sin, cos, tan | Function
  Syntax: sin radians number cos radians number tan radians number Arguments and Values: radians - a number given in radians. number - a number. Description: sin, cos, and tan return the sine, cosine, and tangent, respectively, of radians. Examples:
       (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 12.1.3.3 Rule of Float Substitutability Allegro CL Implementation Details: None.

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