IB skill practice

Find complex roots in polar form

Find modulus or argument information for roots of a complex number.

Paper 1, Paper 2 5 marks Difficulty 3

Find complex roots in polar form - depth scenario

Check the modelling or algorithm condition first. A complex-number model needs the 4 roots of a number on a circle. Find the angular spacing between adjacent roots in degrees. Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.