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If P=cospi/(20)dotcos(3pi)/(20)dotcos(7p...

If `P=cospi/(20)dotcos(3pi)/(20)dotcos(7pi)/(20)dotcos(9pi)/(20)&Q=cospi/(11)dotcos(2pi)/(11)dotcos(4pi)/11dotcos(8pi)/(11)dotcos(16pi)/(11),` then `P/Q` is (a) not defined (b) 1 (c) 2 (d) None of these

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