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Question 44

ABC ABC\,ABC is a right angled triangle. Angle BAC=θBAC = \thetaBAC=θ, where θ \theta\,θ is in radians. AB=5AB = 5AB=5 cm.

Diagram of a right-angled triangle ABC.

Given that θ=5−2\theta = \sqrt{5} - 2θ=5​−2 is small, find an approximation for the length of ACACAC, giving your answer in exact form.

[3]
Markscheme

Radians Questions

  1. A Level
  2. /Maths
  3. /Radians

278 exam-style questions on Edexcel A Level Maths Radians, covering 5.1 Radian Measure, 5.2 Arc Length, 5.3 Areas of Sectors and Segments, 5.4 Solving Trigonometric Equations, and 5.5 Small Angle Approximations. Each one has a worked solution and a mark scheme showing where the marks go.

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