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

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> 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       Log On


   

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