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Hi!, can anybody help me with this problem?

Proof that the position vectorr(t) = A cos [tex]\omega[/tex]ti+ B sin ([tex]\omega[/tex]t + [tex]\alpha[/tex]) moves on an ellipse.

I understand that the parametric equation for an ellipse is x=a cos t & y=b sin t, but I just can't find any trigonometric identity that helps me. Do you know any math trick that could help me?

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# Homework Help: Elliptical motion

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