computes the element-wise inverse hyperbolic secant of the argument.
y = asech(x)
a real or complex array.
a real or complex array.
Computes the element-wise inverse hyperbolic secant of the argument. If the argument is real and have absolute value less than one the result is real.
The following equalities hold: asech(x) == acosh(1 ./ x) ==
%i*csgn(%i*(1−1 ./ x))*asec(x) == csgn(%i*(1 − 1 ./
x))*(%pi/2*(%i+acsch(%i*x)))
.