The domain of arcsin refers to the set of all possible input values for the arcsin function, which is the inverse of the sine function. Specifically, the arcsin function takes values from the interval [-1, 1] and maps them to angles between $$-\frac{\pi}{2}$$ and $$\frac{\pi}{2}$$ radians. Understanding this domain is crucial as it establishes the limitations of the arcsin function and helps in graphing and solving equations involving inverse trigonometric functions.
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