tan, tanl

Remonter à Math.h - Index

Header File

math.h

Category

Math Routines

Prototype

double tan(double x);

long double tanl(long double x);

Description

Calculates the tangent.

tan calculates the tangent. Angles are specified in radians.

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

Return Value

tan and tanl return the tangent of x, sin(x)/cos(x).

Example

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

Portability

	POSIX	Win32	ANSI C	ANSI C++
tan	+	+	+	+
tanl		+	+	+