TAN(3) | Library Functions Manual | TAN(3)

# NAME

`tan`, `tanf` —
tangent function

# LIBRARY

Math Library (libm, -lm)

# SYNOPSIS

`#include <math.h>`

double
`tan`(double x);

float
`tanf`(float x);

# DESCRIPTION

The `tan`() and `tanf`() functions compute the tangent of x (measured in radians). A large magnitude argument may yield a result with little or no significance. For a discussion of error due to roundoff, see math(3).

# RETURN VALUES

The `tan`() function returns the tangent value.

# SEE ALSO

acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3), sinh(3), tanh(3)

# STANDARDS

The `tan`() function conforms to ANSI X3.159-1989 (“ANSI C89”).

May 2, 1991 | NetBSD 9.4