11. Imaginary numbers aren't imaginary, they're just as real ( or unreal ) as other numbers.12. Animal lovers will still receive pleas from groups who use imaginary numbers to gain donations. 13. And imaginary numbers are really good for things that are representable by a differential equation. 14. Imaginary numbers are often used to express frequency domain phenomena to time-domain creatures as ourselves.15. Their budget was built on imaginary numbers , critics said. 16. It requires the use of the natural exponent e \, and the imaginary number i \,. 17. It seemed like a kind of circumstatial justification of the idea that imaginary numbers represent time. 18. Below a certain frequency ( the cut-off frequency ) the propagation constant becomes an imaginary number . 19. Both imaginary numbers have equal claim to being the number whose square is " 1. 20. He is however very eager to understand imaginary numbers , which are mentioned in his maths lesson.
