(lispref.info)Transcendental Functions


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Transcendental Functions
========================

   These mathematical functions are available if floating point is
supported.  They allow integers as well as floating point numbers as
arguments.

 - Function: sin ARG
 - Function: cos ARG
 - Function: tan ARG
     These are the ordinary trigonometric functions, with argument
     measured in radians.

 - Function: asin ARG
     The value of `(asin ARG)' is a number between - pi / 2 and pi / 2
     (inclusive) whose sine is ARG; if, however, ARG is out of range
     (outside [-1, 1]), then the result is a NaN.

 - Function: acos ARG
     The value of `(acos ARG)' is a number between 0 and pi (inclusive)
     whose cosine is ARG; if, however, ARG is out of range (outside
     [-1, 1]), then the result is a NaN.

 - Function: atan ARG
     The value of `(atan ARG)' is a number between - pi / 2 and pi / 2
     (exclusive) whose tangent is ARG.

 - Function: exp ARG
     This is the exponential function; it returns e to the power ARG.

 - Function: log ARG &optional BASE
     This function returns the logarithm of ARG, with base BASE.  If
     you don't specify BASE, the base E is used.  If ARG is negative,
     the result is a NaN.

 - Function: log10 ARG
     This function returns the logarithm of ARG, with base 10.  If ARG
     is negative, the result is a NaN.

 - Function: expt X Y
     This function returns X raised to power Y.

 - Function: sqrt ARG
     This returns the square root of ARG.


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