Apple iWork '09 - Manual (Page 334)

COSH
The COSH function returns the hyperbolic cosine of a number.
COSH(num)
 num: A number. num is a number value.
Examples
=COSH(0) returns 1.
=COSH(1) returns 1.543.
=COSH(5) returns 74.21.
=COSH(10) returns 11,013.233.
Related Topics
For related functions and additional information, see:
“ACOS” on page 327
“ACOSH” on page 328
“COS” on page 333
“Listing of Trigonometric Functions” on page 326
“Value Types” on page 36
“The Elements of Formulas” on page 15
“Using the Keyboard and Mouse to Create and Edit Formulas” on page 26
“Pasting from Examples in Help” on page 41
DEGREES
The DEGREES function returns the number of degrees in an angle expressed in radians.
DEGREES(radian-angle)
 radian-angle: An angle, expressed in radians. radian-angle is a number value.
Although it can be any value, it would normally be in the range –2
π to 2π (–2 pi to
+2 pi).
Examples
=DEGREES(PI()) returns 180 ( π radians = 180 degrees).
=DEGREES(1) returns 57.2957795130823, which is approximately the number of degrees per radian.
334 Chapter 12 Trigonometric Functions