Ononot — If z = f(x,y) where x = \cos(t) and y = \sin(t), which of th

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Multivariable & Vectoreasy

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If $z = f(x,y)$ where $x = \cos(t)$ and $y = \sin(t)$ , which of the following is the correct formula for $\frac{dz}{dt}$ using the chain rule?