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Compound Angle Formulaesin (A + B)= sin A cos B + cos A sin Bcos (A + B)= cos A cos B - sin A sin Btan (A + B)= tan A + tan B 1 - Tan A Tan BA-level standard trigonometry. Maths all correct. Good pluralisation of 'formulae'. Neat handwriting. Loses a mark for 'Tan' instead of 'tan'. But otherwise: excellent work!9/10