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1.7.20 Expressions for a cos θ ± b sin θ (A-level only)

1.7.20 Expressions for a cos θ ± b sin θ (A-level only)

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Question 2

Given that

5cos⁡θ−12sin⁡θ≡Rcos⁡(θ+α) 5 \cos \theta - 12 \sin \theta \equiv R \cos(\theta + \alpha) 5cosθ−12sinθ≡Rcos(θ+α)

find the value of RRR, where R>0R > 0R>0.

Circle the correct answer from the options below:

555 \qquad 777 \qquad 131313 \qquad 171717

[2]
Markscheme

1.7.20 Expressions for a cos θ ± b sin θ (A-level only) Questions

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19 exam-style questions on OCR (MEI) A Level Maths 1.7.20 Expressions for a cos θ ± b sin θ (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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