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d/dt cos(theta)

d/dt t sin(theta)

d/dt r cos (theta)

d/dt r^2 (theta)

d/dt e^ (-3x)

d/dt (x^2 + y^2)

I would assume all by the second one are 0 since your solving for terms dt and not theta, x, y, or r... I don't think its right at all. I know it goes something like this:

d/dt f(x) = dy/dx * dx/dt

I just am not sure how to grasp what I'm doing wrong.

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# Calculus Chain Rule

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