Question

Convert the polar representation of this complex number into its rectangular form: z=5(cos pi + i sin pi)

1) (5 square root3,0)
2) (-5,0)
3) (0,-5)
4) (0,5)

Answer 1

5 (cos π + i sin π) = 5 (-1 + 0i) = -5

Answer 2

is it 2 or 3 then?

Answer 3

2