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Got it! Thanks mate.

Thanks. But i know the formulas. But you sub them in and i just dont know where to go from there. Answers (according to back of book) a) 3sinx cos^2x - sin^3x b) cos^3x - 3 sin^2x cosx c) (3tanx - tan^3x)/(1 - 3 tan^2x) Now i really have no idea how they got these answers. Any help?

Hello Everyone! Been reading these forums for a while, but my first post! Anyway.... I missed a few days of school while my class was doing 'Sums and differences of Angles'. Been doing it today and ive got the hang of it just a few questions i cant get which i would LOVE help with. :) 1...