cos(), cosf() cosine function	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

---

SYNOPSIS

#include <math.h>

double cos(double x)

float cosf(float x)

---

DESCRIPTION

The cos() and cosf() functions compute the cosine of x (measured in radians). A large magnitude argument may yield a result with little or no significance.

The cosf() function is a single-precision version of cos().

---

PARAMETERS

x 

Is an angle in radians.

---

RETURN VALUES

The cos() function returns the cosine value.

If x is NaN, NaN is returned. If the return value would underflow, 0.0 is returned.

---

CONFORMANCE

cos(): ANSI/ISO 9899-1990

cosf(): MKS Toolkit UNIX APIs extension

---

MULTITHREAD SAFETY LEVEL

MT-Safe.

---

PORTING ISSUES

At high levels of compiler optimizations, the hardware handles the cos() function intrinsically. In such cases, mathematical exceptions do not cause the matherr() function to be called or the errno value to be set.

---

AVAILABILITY

MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition

---

SEE ALSO

Functions:

acos(), asin(), atan(), atan2(), cosh(), math(), sin(), sinh(), tan(), tanh()

---

MKS Toolkit 9.5 Documentation Build 3.