This Cis in math provides step-by-step instructions for solving all math problems.

- Decide math problems
- Clarify mathematic tasks
- Explain math

Learn Math with the best. 1st class free! > X. Topics. Modulus of a complex number; Argument of a complex number; Expression of a number

Step-by-step

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Determine math equations

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Get Tasks

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Figure out math problem

Math is a subject that can be difficult for some students to grasp. However, with a little practice and perseverance, anyone can learn to love math!

Dept. of Math. (MAT021) If one defines cis θ = cos θ + i sin θ, then any complex number may be expressed in the form z = |z| cis θ.

cis(θ) is short for cos(θ)+isen(θ) where i = √-1. Then: 12cis(90°) = 12[cos(90°)+isen(90°)] = 12(0+i(1))