OCR Further Pure Core 2 2020 November — Question 8

Exam BoardOCR
ModuleFurther Pure Core 2 (Further Pure Core 2)
Year2020
SessionNovember
TopicComplex numbers 2

8 In this question you must show detailed reasoning. The complex number \(- 4 + i \sqrt { 48 }\) is denoted by \(z\).
  1. Determine the cube roots of \(z\), giving the roots in exponential form. The points which represent the cube roots of \(z\) are denoted by \(A , B\) and \(C\) and these form a triangle in an Argand diagram.
  2. Write down the angles that any lines of symmetry of triangle \(A B C\) make with the positive real axis, justifying your answer.