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

Printable View

- May 28th 2011, 02:19 PMtransgalacticfinding parametric representation of half circle mmn16 1a
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 - May 28th 2011, 02:36 PMmr fantastic
- May 28th 2011, 02:39 PMAlso sprach Zarathustra
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? - May 28th 2011, 11:49 PMtransgalactic
t from 0 to pi

thanks

:)