Paper 1 · Complex Numbers
⏱ Tested in 3 exam questions since 2017
Lesson 10 of 17
Complex Numbers 10: Introduction to Polar Form
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- Convert a + bi into polar form z = R(cos θ + i sin θ) and back again
- Find the argument θ from a right-angle triangle and the page-13 reference angles
- Quadrant-adjust the angle: Q2 = 180°−ref, Q3 = 180°+ref, Q4 = 360°−ref
- Give θ in both degrees and radians, reading it straight off for on-axis points
Most recent exam questions
- 2024 P1 Q2(c)(i)
- 2024 P1 Q2(c)(ii)
- 2019 P1 Q5(b)(i)
- 2017 P1 Q2(b)
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