Question: 2) Simplify the following expression: cos20+ j sin20 (20 marks) cos30 sin30 3) Represent the following complex numbers on argand diagram: a) z = 3+

2) Simplify the following expression: cos20+ j sin20 (20 marks) cos30 sin30 3) Represent the following complex numbers on argand diagram: a) z = 3+ 2j b) z = 4 -5j c) z= 2-j (20 marks) 4) Prove that Cos30 = cos30 - 3CosOsin20. (20 marks)

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