2024 IGCSE Additional Mathematics May/June 0606/23 Q8

2024 IGCSE Additional Mathematics May/June 0606/23 Q8

7 marks

A curve is such that \(\dfrac{\mathrm{d}^2y}{\mathrm{d}x^2}=\cos\left(4x-\dfrac\pi4\right)\). Given that \(\dfrac{\mathrm{d}y}{\mathrm{d}x}=\dfrac34\) at the point \(\left(\dfrac{3\pi}{16},\dfrac\pi4\right)\) on the curve, find the equation of the curve.[7]

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Answer:\(y=-\dfrac1{16}\cos\left(4x-\dfrac\pi4\right)+\dfrac x2+\dfrac{5\pi}{32}\).

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