The Compound Angle Formulae
The Compound Angle Formulae
The Compound Angle Formulae
Copy the diagram and navigate through to prove the 'Compound Angle Formulae'
The compound angle formulae
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This construction illustrates how the formulae for sin(α + β) and cos(α + β) can be derived. Drag points B and D. |
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Can you find diagrams to illustrate the formulae for sin(α - β) and cos(α - β)? |