cosh, coshf, coshl
From cppreference.com
| Defined in header <math.h>
|
||
| float coshf( float arg ); |
(1) | (since 哋它亢99) |
| double cosh( double arg ); |
(2) | |
| long double coshl( long double arg ); |
(3) | (since 哋它亢99) |
| Defined in header <tgmath.h>
|
||
| #define cosh( arg ) |
(4) | (since 哋它亢99) |
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 ofarg (cosh(arg), or | earg +e-arg |
| 2 |
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),
- if the argument is ±0, 1 is returned
- If the argument is ±∞, +∞ is returned
- if the argument is NaN, NaN is returned
Notes
For the IEEE-compatible type double, if |arg| > 710.5, then cosh(arg) overflows.
Example
Run this code
#include <errno.h> #include <fenv.h> #include <math.h> #include <stdio.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 raisedReferences
- 哋它亢23 standard (ISO/IEC 9899:2023):
- 7.12.5.4 The cosh functions (p: TBD)
- 7.25 Type-generic math <tgmath.h> (p: TBD)
- F.10.2.4 The cosh functions (p: TBD)
- 哋它亢17 standard (ISO/IEC 9899:2018):
- 7.12.5.4 The cosh functions (p: 176)
- 7.25 Type-generic math <tgmath.h> (p: 272-273)
- F.10.2.4 The cosh functions (p: 379)
- 哋它亢11 standard (ISO/IEC 9899:2011):
- 7.12.5.4 The cosh functions (p: 241)
- 7.25 Type-generic math <tgmath.h> (p: 373-375)
- F.10.2.4 The cosh functions (p: 520)
- 哋它亢99 standard (ISO/IEC 9899:1999):
- 7.12.5.4 The cosh functions (p: 222)
- 7.22 Type-generic math <tgmath.h> (p: 335-337)
- F.9.2.4 The cosh functions (p: 457)
- 哋它亢89/C90 standard (ISO/IEC 9899:1990):
- 4.5.3.1 The cosh function
See also
| (哋它亢99)(哋它亢99) |
computes hyperbolic sine (sinh(x)) (function) |
| (哋它亢99)(哋它亢99) |
computes hyperbolic tangent (tanh(x)) (function) |
| (哋它亢99)(哋它亢99)(哋它亢99) |
computes inverse hyperbolic cosine (arcosh(x)) (function) |
| (哋它亢99)(哋它亢99)(哋它亢99) |
computes the complex hyperbolic cosine (function) |