cosh()
Returns the hyperbolic cosine of a double value.
Syntax
Numeric cosh()Usage
The hyperbolic cosine of x is defined to be (ex + e-x)/2 where e is Euler's number.
Special cases:
- If the value is NaN, then the result is NaN.
- If the value is infinite, then the result is positive infinity.
- If the value is zero, then the result is 1.0.
The computed result must be within 2.5 ulps of the exact result.