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- Aug 2021
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math.libretexts.org math.libretexts.org
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In general, when a closed interval [a,b][a,b][a, b]is mapped to an arc on the unit circle, the point corresponding to t=at=at = a is called the initial point of the arc, and the point corresponding to t=at=at = a is called the terminal point of the arc.
This doesn't make sense. How can t=a be both the start and the end of an arc.
Then, also confusing, the picture below shows an equation with x and y.
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