X=2*COS(RADIANS(THETA))
Y=SIN(RADIANS(THETA))
--
David Biddulph

"Eric" wrote in message
...
Thank you very much for your suggestions
What if the circle is distorted, and became an ellipse, such as following
equation
(X*X)/(2*2)+(Y*Y)/(1*1)=1
Do you have any suggestions on how to locate the x & y coordinates based
on
the angle for ellipse? If I can find the coordinate for ellipse, then I
can
find the coordinate for circle, since the form of ellipse includes circle.
Do you have any suggestions?
Thank you for any suggestions
Eric

"dlw" wrote:

for radius=r, angle=t, center=j,r

x=r * cos(t)+j
y=r * sin(t) +k

Now you have learned nothing from the assignment, how's that going to
work
out for you?

"Eric" wrote:

Does anyone know any excel function on how to determine the x & y
coordinates
based on angles for circle?
For example, the radius of circle is 1,
if the angle is 0 degree, the the coordinate is (1,0),
if the angle is 90 degree, the the coordinate is (0,1),
if the angle is 60 degree, does anyone have any suggestion on how to
determine the coordinate?
Thank for any suggestions
Eric