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Compound angle formulae for sin, cos and tan.
Applying and reversing the compound angle formulae.
sin 2A, cos 2A (three forms) and tan 2A.
Using identities to reduce and solve equations.
The R-form (harmonic form) and max/min values.
Working from one side using known identities.
Periodic models, amplitude, and extreme values.
Work through each topic to complete the section.