Edexcel OLevel Pure Math Revision Note & Solutions

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Lesson

Lesson-10.1.7- Formal proofs of sin(A + B), cos(A + B) formulae will not be required.

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Lesson-10.1.6- Use of the identity tan?? = sin??/cos??Previous Lesson-10.1.8- Questions using the formulae for sin(A + B), cos(A + B), tan(A + B) may be set; the formulae will be on the formula sheet, for example: sin(A + B) = sinAcosB + cosAsinBNext