SOLUTION: Simplify each of the following by hand. Show your working and give the answers in the form a + bi (a, b are real). (a) i^42 (b) 3+2i/2-5i (c) (2 cos pi/12 + 2i sin pi/12)^4

SOLUTION: Simplify each of the following by hand. Show your working and give the answers in the form a + bi (a, b are real). (a) i^42 (b) 3+2i/2-5i (c) (2 cos pi/12 + 2i sin pi/12)^4

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Question 876815: Simplify each of the following by hand. Show your working and give the
answers in the form a + bi (a, b are real).
(a) i^42
(b) 3+2i/2-5i
(c) (2 cos pi/12 + 2i sin pi/12)^4

Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
I will do a)
i^42=(i^40)(i^2)=(1)(-1)=-1
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