Hyperbolic Cosine

cosh

Hyperbolic cosine

Syntax



Y = cosh(X)

Description

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

Y = cosh(X) returns the hyperbolic cosine for each element of X.

Examples

Graph the hyperbolic cosine function over the domain

.



x = -5:0.01:5;
plot(x,cosh(x)), grid on





Definition

The hyperbolic cosine can be defined as



Algorithm

cosh 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.