1.13: Equation of a curve from a trigonometric second derivative

0606/11/M/J/20 — Question 11 · 8 marks

A curve is such that d2ydx2=5cos2x\dfrac{\mathrm{d}^{2}y}{\mathrm{d}x^{2}} = 5\cos 2x. This curve has a gradient of 34\dfrac{3}{4} at the point (π12,5π4)\left(-\dfrac{\pi}{12}, \dfrac{5\pi}{4}\right). Find the equation of this curve.
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