Specialist Mathematics Β· Unit 2 Β· Trigonometry and functions Β· Trigonometric identities
Model and solve problems that involve equations of the form π cos(π₯) + π sin(π₯) = π.
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Convert sums π cos(π₯) + π sin(π₯) to π
cos(π₯ Β± πΌ) or π
sin(π₯ Β± πΌ) and apply these to sketch graphs.
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Prove and apply multi-angle trigonometric identities up to angles of 4π₯ using the identities listed above, e.g. cos(4π₯) = 8 cos4(π₯) β 8 cos2(π₯) + 1 and cosec(2π₯) β cot(2π₯) = tan(π₯). Specialist Mathematics 2025 v1.4