Inverse Functions

Question

The range of cos⁻¹(x) is

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1. **Principal Branch Selection**: For cosine, we restrict the range to an interval where it captures all values from -1 to 1 exactly once.
2. **Specific Interval**: Since $\cos 0 = 1$ and $\cos \pi = -1$, we choose **$[0, \pi]$**.
3. **Domain**: The corresponding input domain is $[-1, 1]$.

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Inverse Functions

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