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tan(3) [freebsd man page]

TAN(3)							   BSD Library Functions Manual 						    TAN(3)

tan, tanf, tanl -- tangent functions LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double tan(double x); float tanf(float x); long double tanl(long double x); DESCRIPTION
The tan(), tanf(), and tanl() 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(), tanf(), and tanl() functions return the tangent value. SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), ctan(3), math(3), sin(3), sinh(3), tanh(3) STANDARDS
These functions conform to ISO/IEC 9899:1999 (``ISO C99''). BSD
January 24, 2008 BSD

Check Out this Related Man Page

TAN(3)							   BSD Library Functions Manual 						    TAN(3)

tan -- tangent function SYNOPSIS
#include <math.h> double tan(double x); long double tanl(long double x); float tanf(float x); DESCRIPTION
The tan() function computes the tangent of x (measured in radians). SPECIAL VALUES
tan(+-0) returns +-0. tan(+-infinity) returns a NaN and raises the "invalid" floating-point exception. VECTOR OPERATIONS
If you need to apply the tan() function to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may give significantly better performance: #include <Accelerate/Accelerate.h> vFloat vtanf(vFloat x); void vvtanf(float *y, const float *x, const int *n); void vvtan(double *y, const double *x, const int *n); SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tanh(3), math(3) STANDARDS
The tan() function conforms to ISO/IEC 9899:2011. BSD
December 11, 2006 BSD
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