Mathematics (AS & A Level) · May / June 2020 · Paper 13 · Question 5
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A B O P 5 13 The diagram shows a cord going around a pulley and a pin. The pulley is modelled as a circle with centre O and radius 5 cm. The thickness of the cord and the size of the pin P can be neglected. The pin is situated 13 cm vertically below O. Points A and B are on the circumference of the circle such that AP and BP are tangents to the circle. The cord passes over the major arc AB of the circle and under the pin such that the cord is taut. Calculate the length of the cord. [6] 7
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