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5. Given cosa = - 2 3 TT and tan B = - 2 TT 2 31T 2 5. Given cosa = 3 and tan

5. Given cosa = - 2 3 TT and tan B = - 2 TT

2 31T 2 5. Given cosa = 3 and tan" 5 IT IT , determine the exact value of: a) cos(u + ) and 2 b) sin2u . (4 marks)

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