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Determine the value of $a$ and state the exact $x$-coordinate of this point.
Mathematics 9709 · AS & A Level · Differentiation
Differentiation — practice question
For the curve given by $y = e^{-ax} \tan x$, where $a$ is a positive constant, there is just one point in the interval $0 < x < \frac{1}{2}\pi$ where the tangent line is parallel to the $x$-axis.