Hiánypótló blog, végre
Compound Angle Formulae
sin (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
