Students learn how to derive trigonometric identities of the form sin(nx) and cos(nx) using de Moivre's theorem.
Later, as learning progress they use the identities to find roots of an equation.
Edexcel A-Level Mathematics Year 2: Pure 2: Algebraic Methods
Scheme of work: A-Level Further Mathematics: Further Pure 1: The t – formulae
A-Level Scheme of work: Edexcel A-Level Mathematics Year 2: Statistics: Regression, Correlation and Hypothesis Testing