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7 Further trigonometry
7.01 Exact ratios and the unit circle
7.02 Graphs of trigonometric functions
7.03 Periodicity
7.04 Trigonometric equations
7.05 The sine rule
7.06 The cosine rule
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7.07 The area formula
7.08 Applications
7.09 Pythagoras in 3D
7.10 Trigonometry in 3D
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Australia
10&10a

7.06 The cosine rule

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