Solution

Question\n\nFind a point on the curve $y = \tan^{-1} \left( \dfrac{x}{3} \right) - \dfrac{x}{3}$, where tangent is horizontal. Also find the equations of the tangent and normal at that point.\n\nContent coming soon. Write the full solution here, or use the part files (p-i.mdx, p-ii.mdx, …) for each part.