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November 01, 2025, 03:15:12 pm
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Author Topic: Parametric Equations :D  (Read 618 times)  Share 

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HungTran2009

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Parametric Equations :D
« on: March 13, 2010, 02:44:05 pm »
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I need to find the Cartesian equation of the curve with the following parametric equation:

x=cos(2t)-2 and y=3+2sin(2t), t∈[0, pi/2]

The book I'm using (MQ 3rd edition) tells me that the graph is the "top half" of an ellipse. Why is this? I know it has something to do with the "t∈[0, pi/2]" part...but I thought that the angle would've been pi instead...

Thanks





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m@tty

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Re: Parametric Equations :D
« Reply #1 on: March 13, 2010, 02:58:46 pm »
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and


Which is only the top half of the ellipse



« Last Edit: March 13, 2010, 03:05:07 pm by m@tty »
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HungTran2009

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Re: Parametric Equations :D
« Reply #2 on: March 13, 2010, 03:40:51 pm »
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OHHHHHHH :D

Thanks for the help!
And thanks for replying!
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