# (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

- 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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