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1.5 Trigonometry

1.5 Trigonometry

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Question 9

One of the expressions below is equal to $\sin 2A\,$ for all values of $A$ .

Identify this expression.

Select the correct answer.

A

$2sin⁡Acos⁡A2\sin A\cos A$

B

$sin⁡Acos⁡A\sin A\cos A$

C

$2sin⁡A2\sin A$

D

$sin^2 A - \cos^2 A$

Markscheme

1.5 Trigonometry Questions

A Level
Maths
1.5 Trigonometry

317 exam-style questions on OCR A Level Maths 1.5 Trigonometry, covering 1.5.1 Definitions for all arguments, 1.5.2 Sine and cosine rules, 1.5.3 Area of a triangle, 1.5.4 Radian measure (A-level only), 1.5.5 Small angle approximations (A-level only), 1.5.6 Graphs of basic trigonometric functions, 1.5.7 Exact values in radians (A-level only), 1.5.8 Reciprocal and inverse trigonometric ratios (A-level only), 1.5.9 Graphs of reciprocal and inverse functions (A-level only), 1.5.10 Trigonometric identities, 1.5.11 Further trigonometric identities (A-level only), 1.5.12 Double angle and compound angle formulae (A-level only), 1.5.13 Geometrical proofs of formulae (A-level only), 1.5.14 Harmonic form Rcos / Rsin (A-level only), 1.5.15 Trigonometric equations, 1.5.16 Proof involving trigonometric functions (A-level only), and 1.5.17 Trigonometric functions in context. Each one has a worked solution and a mark scheme showing where the marks go.

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