COSH()
Hyperbolic Cosine of the argument
- Syntax
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- COSH (nArea) -> nHyperbolicCosine
- Arguments
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- <nArea> the size of the area (see below)
- Returns
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- <nHyperbolicCosine> the hyperbolic cosine of <nArea>
- Description
-
- The function COSH() calculates the hyperbolic cosine of the argument. In analytical mathematics it is defined as 1/2*(exp(nArea)+exp(-nArea)). A common geometric interpretation of the COSH() function is the maximum x value of the points in the area with the given size <nArea>, that is bound by the x axis, a straight line through the point of origin (this one is fixed by the area) and the hyperbola x^2-y^2=1.
Examples
? cosh (0.0) --> 1.0
? cosh (1.0) --> 1.5430...
Tests
cosh (0.0) == 1.0
cosh (-0.5) == cosh(0.5)
- Status
- Ready
- Compliance
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- COSH() is new in Harbours CT3's library.
- Platforms
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- All
- Files
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- Source is trig.c, library is libct.
- See Also