[AAHL][AASL] (v2) Trigonometric functions

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Hello hello hello!

After the calculus sequence we shall now commence on my second favourite journey: trigonometry. For long-time followers on the site, I have massive booklets to guide you through the whole of trigonometry apart from the very basics (sine rule, cosine rule, area of a triangle, unit circle), which you can find here.

Trig functions is the first time you understand why I say "triangles become circles" the more you know about trigonometry - the function repeats itself after a certain period. You'll have sufficient practice on it by the time you finish the papers - enjoy!

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