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In a polar coordinate system, O is the pole. The polar coordinates of the points A and B are (k , 875) and (12 ,

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In a polar coordinate system, O is the pole. The polar coordinates of the points A and B are (k , 875) and (12 , 177") respectively, where & is a positive constant. It is given that AR = 13. Is AOAB a right-angled triangle? Explain your answer. b) Find the perimeter of AQAB. Let C be a point in the polar coordinate system such that /BOC' . 25 and OC = OB. Find two possible polar coordinates of C

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