What is i^3? Precalculus Complex Numbers in Trigonometric Form Powers of Complex Numbers 1 Answer Kevin B. Mar 22, 2015 -i i^3 can be rewritten as i^2 * i Since i^2 = -1, i^3 = -1 * i = -i Answer link Related questions How do I use DeMoivre's theorem to find (1+i)^5? How do I use DeMoivre's theorem to find (1-i)^10? How do I use DeMoivre's theorem to find (2+2i)^6? What is i^2? What is i^4? How do I find the value of a given power of i? How do I find the nth power of a complex number? How do I find the negative power of a complex number? Write the complex number i^17 in standard form? How do you simplify i^-33? See all questions in Powers of Complex Numbers Impact of this question 58590 views around the world You can reuse this answer Creative Commons License