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fue for all values of a and B ether the identity of costa B cosacos...

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fue for all values of a and B ether the identity of costa B cosacos sinasing is Let P cosa sina and Q cos sin be any two points on the circle O with radius 1 If POA a and QOA 8 then POQ a B P cosa sina Q cos sia p 2 1 1 Make use of the cosine rule to determine the length of PQ 4 1 0 Make use of the distance formula to determine the length of PQ

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