### Home > CCA2 > Chapter 8 > Lesson 8.2.1 > Problem8-71

8-71.

Explain why $i^{3} = –i$. What does $i^{4}$ equal?

$i ^{3} = i ^{2} · i$. What does $i ^{2}$ equal?

How can you rewrite $i ^{4}$ as a product of $i ^{2}$ and/or $i$ factors?