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# acos

Inverse cosine in radians

### acos(A)

• A should be an array, which can be real or complex.
• It returns an array containing inverse cosine (in radians) of each element of A.
• The output has the same size as A.

Example 1: Plotting arc cosine.

x=linspace(-1,1);
y=acos(x);
plot(x,y,'.-');
xlabel('x')
ylabel('acos(x)')

Plot is generated.