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Given that 2 = cos + i sin 0. (9. Prove that (5.2) cos 0+ sin 0 = 1. Solve the equation and find

Given that 2 = cos + i sin 0. (9. Prove that (5.2) cos 0+ sin 0 = 1. Solve the equation and find all possible angles 31 +31-11-30.

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