tanh, tanhl

Remonter à Math.h - Index

Header File

math.h

Category

Math Routines

Prototype

double tanh(double x);

long double tanhl(long double x);

Description

Calculates the hyperbolic tangent.

tanh computes the hyperbolic tangent, sinh(x)/cosh(x).

tanhl is the long double version; it takes a long double argument and returns a long double result. Error handling for these functions can be modified through the functions _matherr and _matherrl.

Return Value

tanh and tanhl return the hyperbolic tangent of x.

Example

 #include <stdio.h>
 #include <math.h>
 int main(void)
 {
    double result, x;
    x = 0.5;
    result = tanh(x);
    printf("The hyperbolic tangent of %lf is %lf\n", x, result);
    return 0;
 }

Portability

	POSIX	Win32	ANSI C	ANSI C++
tanh	+	+	+	+
tanhl		+	+	+