Ken Ward's Mathematics Pages

Trigonometry

Pages in this Section

1. Basic Formulae
2. Compound and DoubleAngles 
3. Compound Angle Proofs
4. Pythagoras Theorem
5. Half Angle Formulae
6. Heron's Formula
7. Sum and Product of Sine and Cosine
8. Multiple Angles: De Moivre's Theorem
9. Sine, Cosine and Tangent of Multiple Angles (Chebyshev's Method)
10. Cosine Multiple Angle Formulae
11. Sine Multiple Angle Formulae
12. Tangent Multiple Angle Formulae
13. DeMoirve's Theorem Extended Cosine
14. DeMoirve's Theorem Extended Sine