218: Compound Angle Formulae

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Deriving the Compound Angle Formulae

E6-01 Compound Angles: Proving the Compound Angle Formulae

Using the Compound Angle Formulae

E6-02 Compound Angles: Exact Values of sin(105°), cos(150°) & tan(15°)

E6-03 Compound Angles: Using the Formulae Backwards