Standard C++ Library Reference ISO/IEC (VERSION3)

cos, cosf, cosl
double cos(double x);
float cos(float x); [C++ only]
long double cos(long double x); [C++ only]
float cosf(float x); [required with C99]
long double cosl(long double x); [required with C99]
The function returns the cosine of x. If x is large the value returned might not be meaningful, but
the function reports no error.
cosh, coshf, coshl
double cosh(double x);
float cosh(float x); [C++ only]
long double cosh(long double x); [C++ only]
float coshf(float x); [required with C99]
long double coshl(long double x); [required with C99]
The function returns the hyperbolic cosine of x.
exp, expf, expl
double exp(double x);
float exp(float x); [C++ only]
long double exp(long double x); [C++ only]
float expf(float x); [required with C99]
long double expl(long double x); [required with C99]
The function returns the exponential of x, e^x.
floor, floorf, floorl
double floor(double x);
float floor(float x); [C++ only]
long double floor(long double x); [C++ only]
float floorf(float x); [required with C99]
long double floorl(long double x); [required with C99]
The function returns the largest integer value not greater than x.