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# Cartesian equations watch

1. find cartesian

x =sint , y=cos2t

is mine correct

x = root (1/2 - y/2)

the root means that the 1/2 - y/2 is in root
2. (Original post by otrivine)
find cartesian

x =sint , y=cos2t

is mine correct

x = root (1/2 - y/2)

the root means that the 1/2 - y/2 is in root
Yes though the equation looks much nicer with y the subject - its probably also quicker to get to . . .
3. (Original post by otrivine)
find cartesian

x =sint , y=cos2t

is mine correct

x = root (1/2 - y/2)

the root means that the 1/2 - y/2 is in root
I would use the double angle formula to expand y and write it in terms of x - then you don't have any horrible square roots to worry about!
4. (Original post by otrivine)
find cartesian

x =sint , y=cos2t

is mine correct

x = root (1/2 - y/2)

the root means that the 1/2 - y/2 is in root
Just another hint:

so

arranging

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Updated: March 27, 2013
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