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 
);

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 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.

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

For additional compatibility information, see Compatibility in the Introduction.

Example

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

.NET Framework Equivalent

• System::Math::Cos

• System::Math::Cosh

See Also

Concepts

Floating-Point Support

acos, acosf

asin, asinf

atan, atanf, atan2, atan2f

_matherr

sin, sinf, sinh, sinhf

tan, tanf, tanh, tanhf