atan, atanh

Purpose

Inverse tangent and inverse hyperbolic tangent.

Synopsis

Y = atan(X)
Y = atanh(X)

Description

atan and atanh operate element-wise on matrices. Their domains and ranges include complex values. All angles are in radians.

atan(X) returns the inverse tangent for each element of X. For real elements of X in the range [-1,1], atan(x) is in the range [-pi/4,pi/4]. atan(X) is always real.

atanh(X) returns the inverse hyperbolic tangent for each element of X.

Examples

Graph the inverse tangent function for the range -2 <= x <= 2.

x = -2:.05:2;
plot(x, atan(x))

Algorithm

See Also

atan2, cos, exp, funm, log, sin, sqrt, tan

(c) Copyright 1994 by The MathWorks, Inc.