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**Unformatted text preview: **→ t Circle: If we let t = the angle, then: cos sin 2 x t y t t π = = ≤ ≤ Since: 2 2 sin cos 1 t t + = 2 2 1 y x + = 2 2 1 x y + = We could identify the parametric equations as a circle. → Graph on your calculator: Y= xt1 cos( ) t = yt1 sin( ) t = WINDOW GRAPH 2 π Use a [-4,4] x [-2,2] window. → Ellipse: 3cos 4sin x t y t = = cos sin 3 4 x y t t = = 2 2 2 2 cos sin 3 4 x y t t + = + 2 2 1 3 4 x y + = This is the equation of an ellipse. π...

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