Apple iWork '09 - Manual (Page 326)

326
The trigonometric functions help you work with angles and
their components.
Listing of Trigonometric Functions
iWork provides these trigonometric functions for use with tables.
Function Description
“ACOS” (page 327) The ACOS function returns the inverse cosine
(arccosine) of a number.
“ACOSH” (page 328) The ACOSH function returns the inverse
hyperbolic cosine (hyperbolic arccosine) of a
number.
“ASIN” (page 329) The ASIN function returns the arcsine (the inverse
sine) of a number.
“ASINH” (page 329) The ASINH function returns the inverse
hyperbolic sine of a number.
“ATAN” (page 330) The ATAN function returns the inverse tangent
(arctangent) of a number.
“ATAN2” (page 331) The ATAN2 function returns the angle, relative to
the positive x-axis, of the line passing through
the origin and the specified point.
“ATANH” (page 332) The ATANH function returns the inverse
hyperbolic tangent of a number.
“COS” (page 333) The COS function returns the cosine of an angle
that is expressed in radians.
“COSH” (page 334) The COSH function returns the hyperbolic cosine
of a number.
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Trigonometric Functions