Trigonometric Identities | OCR A-Level Maths | 40 Worked Examples (H240)

A complete, fully worked question pack on Trigonometric Identities for OCR A-Level Mathematics A (H240, content points 1.05j to 1.05l). 40 questions ramp from Easy to Challenging, each solved line by line with a plain-English reason on every step and OCR-style mark-scheme annotations (M1/A1/B1) folded in on the real award lines. Covers the reciprocal and Pythagorean identities (tan = sin/cos, sin^2 + cos^2 = 1, 1 + tan^2 = sec^2, 1 + cot^2 = cosec^2), the compound-angle formulae for sin, cos and tan, and the double-angle formulae, applied to simplifying expressions, proving identities, evaluating exact surd values and solving identity-based equations. Reflects OCR’s own conventions throughout: the compound-angle formulae are treated as given on the paper while the double-angle and Pythagorean identities are recalled, exact answers stay in surd form, decimals are given to 3 significant figures, and detailed-reasoning (DR) show/prove questions are worked in full. Modelled on OCR H240 past-paper wording and answer-format conventions. Ideal for revision, homework, cover lessons and one-to-one tuition. Answers are self-contained, so students can self-mark. Hand-written and mark-scheme accurate.