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Trigonometric Identities and Equations

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Question 102

At 12 noon the temperature in Harry’s house is 18°C. At 6 pm the temperature in Harry’s house is 25°C. Harry models the temperature in his house, T, by the formula

T=18+7sin⁡(15h) T = 18 + 7 \sin(15h) T=18+7sin(15h)

where h h\,h is the number of hours after 12 noon.

Using the model find the number of hours in a day that the temperature will be above 21.5°C

[4]
Markscheme

Trigonometric Identities and Equations Questions

  1. A Level
  2. /Maths
  3. /Trigonometric Identities and Equations

322 exam-style questions on Edexcel A Level Maths Trigonometric Identities and Equations, covering 10.1 Angles in all four Quadrants, 10.2 Exact Values of Trigonometric Ratios, 10.3 Trigonometric Identities, 10.4 Solving Trigonometric Equations, 10.5 Harder Trigonometric Equations, and 10.6 Equations and Identities. Each one has a worked solution and a mark scheme showing where the marks go.

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