cos, cosf, cosh, coshf
Calculate the cosine (cos or cosf) or hyperbolic cosine (cosh or coshf).
double cos( double x ); float cos( float x ); // C++ only long double cos( long double x ); // C++ only float cosf( float x ); double cosh( double x ); float cosh( float x ); // C++ only long double cosh( long double x ); // C++ only float coshf( float x );
Parameter
- x
- Angle in radians.
Return Value
The cosine or hyperbolic cosine of x. If x is greater than or equal to 263, or less than or equal to –263, a loss of significance in the result of a call to cos occurs.
If the result is too large in a cosh or coshf call, the function returns HUGE_VAL and sets errno to ERANGE, by default.
| Input | SEH Exception | Matherr Exception |
|---|---|---|
| ± QNAN,IND | none | _DOMAIN |
| ± ∞ (cosf, cos) | INVALID | _DOMAIN |
| x ≥ 7.104760e+002 (cosh, coshf) | INEXACT+OVERFLOW | OVERFLOW |
Remarks
C++ allows overloading, so you can call overloads of cos and cosh. In a C program, cos and cosh always take and return a double.
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| cos, cosh, cosf, coshf | <math.h> | ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
Example
See the example in sin, sinf, sinh, sinhf.
See Also
Floating-Point Support Routines | acos | asin | atan | _matherr | sin | tan | Run-Time Routines and .NET Framework Equivalents
