7: Trigonometry & modelling Flashcards by Katya Bungay-Hill | Brainscape

Q

Part a

A

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Q

Part b

A

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Q

Use the addition / compound-angle formulae to derive the double-angle formulae:

Sin(2A)
Cos(2A)
Tan(2A)

A

2 sinA cosA
Cos²A - sin²A or 2cos²A - 1 or 1 - 2 sin²A
2 tanA / 1 - tan² A

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