Question

write the domain of f(x)=cos -1x​

Answer 1

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Answer 2

Here is your answer❤

Given:

f(x)=cos^−1x

The domain of f(x) is equivalent to the range of values of x for which f(x) exists

Let f(x)=θ , we get x=cosθ

The range of cosθ is [−1,1]

Therefore the range of x is [−1,1]

Hence, the domain of f(x) is [−1,1]