Question: 6. (a) Solve the equation z1 - 1 = 0. (b) Hence, show that 5 i. 21 - 1 = (2 - 1) II 2

6. (a) Solve the equation z1 - 1 = 0. (b) Hence, show that 5 i. 21 - 1 = (2 - 1) II 2 KT 22 - 22 cos + 1 11 k=1 5 ii. (1 + z)11 - (1 - 2)1 = 22 II K T 22 + tan 11 k=1 (c) Hence, deduce that CT 5 (1) II sec2 K T = 1024 11 (ii) k n sec 2 11 = 60 k=1 k=1

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