TANH function
Description
Hyperbolic tangent function. TANH(x) returns the hyperbolic tangent of the angle x. The argument x must be expressed in radians. To convert degrees to radians you use the RADIANS function.
The hyperbolic tangent can be defined as:
$$ \operatorname{tanh}(x) = \frac{\operatorname{sinh}(x)}{\operatorname{cosh}(x)} $$
where sinh is the hyperbolic sine function and cosh is the hyperbolic cosine function.
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Relation with COSH and SINH functions
