cos-cosf-cosl-cosh-coshf-coshl.md

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cos, cosf, cosl, cosh, coshf, coshl | Microsoft Docs		11/04/2016			cpp-standard-libraries		article	coshl cosh cos cosl cosf coshf	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-math-l1-1-0.dll	DLLExport	coshl cos cosf cosh cosl coshf	C++	cosines cosl function calculating cosine cosf function cos function cosh function coshf function trigonometric functions cosines, calculating coshl function hyperbolic functions	ae90435e-6b68-4a47-a81f-be87d5c08f16	17	corob-msft	corob	ghogen

cos, cosf, cosl, cosh, coshf, coshl

Calculates the cosine (cos, cosf, or cosl), or hyperbolic cosine (cosh, coshf, or coshl).

Syntax

double cos(   
   double x   
);  
float cos(  
   float x   
);  // C++ only  
long double cos(  
   long double x  
);  // C++ only  
float cosf(   
   float x   
);  
long double cosl(  
   long double x  
);  
double cosh(   
   double x   
);  
float cosh(  
   float x   
);  // C++ only  
long double cosh(  
   long double x  
);  // C++ only  
float coshf(  
   float x   
);  
long double coshl(  
   long double x  
);  

Parameters

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, cosf, or cosl occurs.

By default, if the result is too large in a cosh, coshf, or coshl call, the function returns HUGE_VAL and sets errno to ERANGE.

Input	SEH Exception	Matherr Exception
± QNAN,IND	none	_DOMAIN
± ∞ (cosf, cos, cosl)	INVALID	_DOMAIN
x ≥ 7.104760e+002 (cosh, coshf, coshl)	INEXACT+OVERFLOW	OVERFLOW

Remarks

Because C++ allows overloading, you can call overloads of cos and cosh that take and return float or long double values. In a C program, cos and cosh always take and return a double.

Requirements

Routine	Required header
cos, cosh, cosf, coshf, cosl, coshl	<math.h>

For additional compatibility information, see Compatibility.

Example

See the example in sin, sinf, sinl, sinh, sinhf, sinhl.

See Also

Floating-Point Support
acos, acosf, acosl
asin, asinf, asinl
atan, atanf, atanl, atan2, atan2f, atan2l
_matherr
sin, sinf, sinl, sinh, sinhf, sinhl
tan, tanf, tanl, tanh, tanhf, tanhl
_CIcos