Acos

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Acos


Inverse cosine function



Syntax


Acos(x)

x is scalar

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


x is matrix

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


Examples


Input

Output

acos(0)

acos(1+i)

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

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


See Also


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