How do you simplify i^13? Precalculus Complex Numbers in Trigonometric Form Powers of Complex Numbers 1 Answer sjc Oct 21, 2016 i Explanation: i=sqrt-1 i^2=-1 i^3=i i^4=1 multiplying bi i repeats the pattern. So any i^(4n)=i Since 13-=1(mod4) i^(13)=i^1=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^3? 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? See all questions in Powers of Complex Numbers Impact of this question 22928 views around the world You can reuse this answer Creative Commons License