|MATLAB Function Reference|
sec function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.
Y = sec(X)
returns an array the same size as
X containing the secant of the elements of
Graph the secant over the domains and .
sec(pi/2) does not evaluate as infinite but as the reciprocal of the floating-point accuracy
pi is a floating-point approximation to the exact value of .
The secant can be defined as
sec 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.