From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/c/numeric%2Fmath%2Fcosh.html | 77 ++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 devdocs/c/numeric%2Fmath%2Fcosh.html (limited to 'devdocs/c/numeric%2Fmath%2Fcosh.html') diff --git a/devdocs/c/numeric%2Fmath%2Fcosh.html b/devdocs/c/numeric%2Fmath%2Fcosh.html new file mode 100644 index 00000000..493b5d19 --- /dev/null +++ b/devdocs/c/numeric%2Fmath%2Fcosh.html @@ -0,0 +1,77 @@ +

cosh, coshf, coshl

Defined in header <math.h> 
float       coshf( float arg );
+		 (1) (since C99) 
double      cosh( double arg );
+		 (2) 
long double coshl( long double arg );
+		 (3) (since C99)
Defined in header <tgmath.h> 
#define cosh( arg )
+		 (4) (since C99)
+1-3) Computes the hyperbolic cosine of arg.
+4) Type-generic macro: If the argument has type long double, coshl is called. Otherwise, if the argument has integer type or the type double, cosh is called. Otherwise, coshf is called. If the argument is complex, then the macro invokes the corresponding complex function (ccoshf, ccosh, ccoshl).

Parameters

+ +
arg - floating point value representing a hyperbolic angle

Return value

If no errors occur, the hyperbolic cosine of arg (cosh(arg), or earg+e-arg/2) is returned.

If a range error due to overflow occurs, +HUGE_VAL, +HUGE_VALF, or +HUGE_VALL is returned.

+

Error handling

Errors are reported as specified in math_errhandling.

+

If the implementation supports IEEE floating-point arithmetic (IEC 60559),

+

Notes

For the IEEE-compatible type double, if |arg| > 710.5, then cosh(arg) overflows.

+

Example

#include <stdio.h>
+#include <math.h>
+#include <errno.h>
+#include <fenv.h>
+ 
+// #pragma STDC FENV_ACCESS ON
+int main(void)
+{
+    printf("cosh(1) = %f\ncosh(-1)= %f\n", cosh(1), cosh(-1));
+    printf("log(sinh(1) + cosh(1))=%f\n", log(sinh(1)+cosh(1)));
+    // special values
+    printf("cosh(+0) = %f\ncosh(-0) = %f\n", cosh(0.0), cosh(-0.0));
+    // error handling 
+    errno=0; feclearexcept(FE_ALL_EXCEPT);
+    printf("cosh(710.5) = %f\n", cosh(710.5));
+    if(errno == ERANGE) perror("    errno == ERANGE");
+    if(fetestexcept(FE_OVERFLOW)) puts("    FE_OVERFLOW raised");
+}

Possible output:

+
cosh(1) = 1.543081
+cosh(-1)= 1.543081
+log(sinh(1) + cosh(1))=1.000000
+cosh(+0) = 1.000000
+cosh(-0) = 1.000000
+cosh(710.5) = inf
+    errno == ERANGE: Numerical result out of range
+    FE_OVERFLOW raised

References

See also

+ + + + +
+
(C99)(C99)
 computes hyperbolic sine (\({\small\sinh{x} }\)sinh(x))
(function)
+
(C99)(C99)
 computes hyperbolic tangent (\({\small\tanh{x} }\)tanh(x))
(function)
+
(C99)(C99)(C99)
 computes inverse hyperbolic cosine (\({\small\operatorname{arcosh}{x} }\)arcosh(x))
(function)
+
(C99)(C99)(C99)
 computes the complex hyperbolic cosine
(function)
C++ documentation for cosh
+

+ © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
+ https://en.cppreference.com/w/c/numeric/math/cosh +

+
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