STEP Trig Identities

Which trig identities will I need for STEP I and STEP II other than the c3/c4 ones.
I wanna learn how to do STEP questions y the end of december.

Half angle formulae can be useful, and I don't think they are covered in C3, or at least not very well.

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Half angle formulae can be useful, and I don't think they are covered in C3, or at least not very well.

Posted from TSR Mobile

OCR don't cover them at all in the A-Level, might do in the Further Maths A Level. Weird, as OCR is the board (pretty much) that sets STEP.

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