Understanding Point Functions in Mathematics

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abhishek.93
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what is a point function
 
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I wanted to find out what a "ponit" function was!

An important example of a "point function" is the function that assigns, to every non-negative real number t, the point on the unit circle on a Cartesian coordinate system at distance t around the circumference of the circle, counterclockwise or if t< 0, the clockwise.