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FreeMat
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Section: Mathematical Functions
Computes the inverse secant of its argument. The general syntax for its use is
y = asec(x)
where x is an n-dimensional array of numerical type.
The acosh function is computed from the formula
Here is a simple plot of the inverse secant function
--> x1 = -5:.01:-1;
--> x2 = 1:.01:5;
--> plot(x1,asec(x1),x2,asec(x2)); grid('on');