Apple iWork '09 - Manual (Page 339)

Chapter 12 Trigonometric Functions 339
TANH
The TANH function returns the hyperbolic tangent of the specified number.
TANH(num)
 num: A number. num is a number value.
Examples
=TANH(0) returns 0.
=TANH(1) returns 0.762.
=TANH(5) returns 0.999909.
=TANH(10) returns 0.999999996.
Related Topics
For related functions and additional information, see:
“ATAN” on page 330
“ATAN2” on page 331
“ATANH” on page 332
“TAN” on page 338
“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