Mathematics (AS & A Level) · May / June 2019 · Paper 12 · Question 5
9709
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1 rad r O A B C The diagram shows a semicircle with diameter AB, centre O and radius r. The point C lies on the circumference and angle AOC = 1 radians. The perimeter of sector BOC is twice the perimeter of sector AOC. Find the value of 1 correct to 2 significant figures. [5]
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