Basically I have a pointer that starts at a particular reference point on a circle with cartisean coordinates,this pointer then moves around the circumference of the circle with an angle theta, the arc length is known but what I need to find is the change relative to x and y.(adsbygoogle = window.adsbygoogle || []).push({});

I know that the arc length is given by;

[tex]\delta c =r_{c}\theta_{a}[/tex]

where [tex]\delta c, r_{c}, \theta_{a}[/tex] are the arc length, radius of the circle and the angle of the arc respectively.

[tex]\delta c, r_{c}[/tex], and [tex]\theta_{a}[/tex] are known

but what i don't know is how to find the new position of the pointer relative to x and y;

hence I need to find the change in x and the change in y.

I don't really know where to begin so if I could get some pointers rather than the answer then that would great.

Thanks for your time

N

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# Homework Help: Change in x and y for a change in position

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