What is the domain of the function ? f(x)=cos^-1x

(-infinity,positive infinity)

-1<x<1

[-pie/2, pie/2]

[-1,1]

The domain of inverse cosine (cos^-1(x)) will be the range of cos(x) because when you take an inverse, you switch x and y and solve for y. The range of cos(x) is [-1,1]. This is therefore, the domain of cos^-1(x).

B :)

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