SOLUTION: Eliminate the parameter. x = 3 cos t, y = 3 sin t

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Question 1137703: Eliminate the parameter.
x = 3 cos t, y = 3 sin t

Answer by ikleyn(52824) About Me  (Show Source):
You can put this solution on YOUR website!
.
x = 3 cos t, 

y = 3 sin t


Square both equations and then add them. You will get


x%5E2 + y%5E2 = 9%2Acos%5E2%28t%29 + 9%2Asin%5E2%28t%29 = 9%2A%28sin%5E2%28t%29+%2B+cos%5E2%28t%29%29 = 9.


Thus finally your equation is


x%5E2+%2B+y%5E2 = 9.     (1)


It is the equation of the circle of the radius 3 units centered at the origin of the coordinate system at (x,y)-coordinate plane.


Thus the parameter  " t "  is just eliminated, and the result is the equation (1).

Solved, explained and completed.


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By the way, this your post is a duplicate.

It was posted to the forum 3 - 4 days ago, and I and @greenestamps just answered it.

So, I do not understand what was the meaning of posting it again.