(i)[7]
Show that $\frac{dy}{dx} = \frac{2(\cos^2 x + \cos x - 1)}{\cos x + 1}$.
(ii)[3]
Find the $x$-coordinate of every stationary point on the curve in the interval $-\pi < x < \pi$. State each answer correct to $3$ significant figures.
Mathematics 9709 · AS & A Level · Differentiation
Differentiation — practice question
The curve is defined by $y = \frac{\sin 2x}{\cos x + 1}$.
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