(b) Find $T(t)$ and $N(t)$ at $t = \frac{\pi}{2}$ and $t = \pi$. Add these to your sketch. 4. Find and sketch the domain of the function $f(x, y) = \frac{\ln(x^2 + 4y^2 - 4)}{9 - x^2}$.
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In this case, the function is given by 9 - r^2. Show more…
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