Specialist Mathematics · Unit 2 · Complex arithmetic and algebra · Complex arithmetic using polar form

Use the modulus |𝑧| of a complex number 𝑧 and the principal argument Arg(𝑧) of a non-zero complex number 𝑧. |𝑧| = √𝑎2 + 𝑏2 Arg(𝑧) = 𝜃, tan(𝜃) = 𝑏 𝑎, −𝜋 < 𝜃 ≤ 𝜋, 𝑎 ≠ 0

Learning objective 6 of 6 in this subtopic