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At time t, a moving particle has position r(t)=((e^t) + (e^-t))/2 i + ((e^t) - (e^-t))/2 j.

a) find the cartesian equation of the path

I know all you have to do is let the i component to equal x(t) and then make t the subject, and then with the j component let it equal y and sub t into y. but i can't get t to be the subject in the equation.

someone please give it a go