Question

x= cos(t)-sin(t), y = cos(t)+sin(t), 0<=t<=2pi
find the Cartesian equation by eliminating t

Answer 1

@aqouta
Any ideas how to do this?

Answer 2

the having 2 trig functions in each is really throwing me for a loop i tried most of my default methods

Answer 3

Interesting... what's one of your default methods? :D

Answer 4

attempting to isolate a cos and sin on each of the equations or shape them into a trig identity.

Answer 5

Well, here's an idea... what's x+y ?

Answer 6

2cost

Answer 7

2cost lol
anyway...
And what's x-y ?
:3

Answer 8

i think i see where you're going with this

Answer 9

Whoops... y-x... sorry
use y-x instead

Answer 10

Awesome :)

Answer 11

thnx

Answer 12

No problem :)
Is this your first and last question here? Stick around :D

Answer 13

ill remember this site in the future

Answer 14

I'll be waiting >:D
LOL
I surely hope you do :)