Acosh

Acosh(x)

x is scalar

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

x is matrix

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

Input

Output

acosh(0)

acosh(1+i)

acosh([1+i, 0, 1-i])

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