- Basic Formulae
- Compound and DoubleAngles
- Pythagoras Theorem
- Half Angle Formulae
- Heron's Formula
- Sum and Product of Sine and Cosine
- Multiple Angles: De Moivre's Theorem
- Sine, Cosine and Tangent of Multiple Angles (Chebyshev's Method)
- Cosine Multiple Angle Formulae
- Sine Multiple Angle Formulae
- Tangent Multiple Angle Formulae
- DeMoirve's Theorem Extended Cosine
- DeMoirve's Theorem Extended Sine

Ken Ward's Mathematics Pages

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Ken's book is packed with examples and explanations that enable you to discover more than 150 techniques to speed up your arithmetic and increase your understanding of numbers. Paperback and Kindle: