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A globe representing the earth has a radius 0.5m. Points A #(0^0, 10^0W)#, B #(0^0, 35^0E)#, P #(60^0N, 110^0E)# and Q #(60^0N, 120^0W)# are marked on the globe.
(a) Find the length of the arc AB, leaving your answer in terms of #pi#
(b) If O is the centre of the latitude 600N, find the area of the minor sector OPQ.