Mathematics (AS & A Level) · Oct / Nov 2018 · Paper 11 · Question 9
9709
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1 50 rad O A B C D 5 cm The diagram shows a triangle OAB in which angle ABO is a right angle, angle AOB = 1 50 radians and AB = 5 cm. The arc BC is part of a circle with centre A and meets OA at C. The arc CD is part of a circle with centre O and meets OB at D. Find the area of the shaded region. [8] 15
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