Asech

Asech(x)

x is scalar

Return a scalar which is the inverse hyperbolic secant function of x, where result is in radian unit

x is matrix

Return a matrix in which the element is the inverse hyperbolic secant function of the element in x, where result is in radian unit

Input

Output

asech(1)

asech(1+i)

asech([1+i, 1, 1-i])

asech([i, 1-3i; -2i, 5])