i have a curve from(-2,0) to (2,0) half circle how to find the formula for x and y ? i know that its some sort of trigonometric expression
Last edited by transgalactic; May 29th 2011 at 12:47 AM.
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Originally Posted by transgalactic i have a curve from(-2,0) to (2,0) half circle how to find the formula for x and y ? i know that its some sort of trigonometric expression At the level you're studying at you're expected to know this. x = 2 cos(t) y = 2 sin(t) The domain of t is left for you to find.
x=R*cos(t) y=R*sin(t) {IT BECAUSE x^2+y^2=R^2 describes a circle} R is the radius. (R=2 in your case) t-is angle. Now, in your opinion which restriction should be on t to get half circle?
t from 0 to pi thanks
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