MATLAB Function Reference

tan

Tangent

Syntax

• Y = tan(X)
  

Description

The tan function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.

Y = tan(X) returns the circular tangent of each element of X.

Examples

Graph the tangent function over the domain .

• x = (-pi/2)+0.01:0.01:(pi/2)-0.01;
  plot(x,tan(x)), grid on
  
  
  

The expression tan(pi/2) does not evaluate as infinite but as the reciprocal of the floating point accuracy eps since pi is only a floating-point approximation to the exact value of .

Definition

The tangent can be defined as

Algorithm

tan uses FDLIBM, which was developed at SunSoft, a Sun Microsystems, Inc. business, by Kwok C. Ng, and others. For information about FDLIBM, see http://www.netlib.org.

See Also

atan, atan2, tanh

system

tanh