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Trigonometry and Modelling

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Question 171

Verify that, for 0≤θ<360∘0 \leq \theta < 360^\circ0≤θ<360∘,

sin⁡(θ−45)=cos⁡(θ+30) \sin(\theta - 45) = \cos(\theta + 30) sin(θ−45)=cos(θ+30)

has solutions θ=52.5∘,232.5∘\theta = 52.5^\circ, 232.5^\circθ=52.5∘,232.5∘.

[6]
Markscheme

Trigonometry and Modelling Questions

  1. A Level
  2. /Maths
  3. /Trigonometry and Modelling

348 exam-style questions on Edexcel A Level Maths Trigonometry and Modelling, covering 7.1 Addition Formulae, 7.2 Double Angle Formulae, 7.3 Solving Trigonometric Equations, 7.4 Simplifying a cos x +- b sin x, 7.5 Proving Trigonometric Identities, and 7.6 Modelling with Trigonometric Functions. Each one has a worked solution and a mark scheme showing where the marks go.

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