www.gusucode.com > elfun工具箱matlab源码程序 > elfun/secd.m
%SECD Secant of argument in degrees. % SECD(X) is the secant of the elements of X, expressed in degrees. % For odd integers n, secd(n*90) is infinite, whereas sec(n*pi/2) is large % but finite, reflecting the accuracy of the floating point value for pi. % % Class support for input X: % float: double, single % % See also ASECD, SEC. % Copyright 1984-2010 The MathWorks, Inc. % Built-in function.