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A Level Mathematics Syllabus Statement

Trigonometry

These are the Transum resources related to the statement: "understand and use double angle formulae; use of formulae for sin (A ± B), cos (A ± B), and tan (A ± B);
understand geometrical proofs of these formulae;
understand and use expressions for a cosθ + b sinθ in the equivalent forms of r cos (θ ± α) or r sin (θ ± α)"

Here is an exam-style questions on this statement:

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