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Trigonometric Ratios

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Question 75

Diagram of triangle ACD with B on AC, an angle at A marked 60°, AD marked 15 cm, and CD and BD each marked k cm.

ACD ACD\,ACD is a triangle and B B\,B lies on ACACAC. Angle CAD=60∘CAD = 60^\circCAD=60∘, AD=15AD = 15AD=15 cm, BD=CD=kBD = CD = kBD=CD=k cm

a.

Find the length of AC AC\,AC in terms of kkk

[3]
b.

Hence, or otherwise, find the length of AB AB\,AB in terms of kkk

[1]
Markscheme

Trigonometric Ratios Questions

  1. A Level
  2. /Maths
  3. /Trigonometric Ratios

217 exam-style questions on Edexcel A Level Maths Trigonometric Ratios, covering 9.1 The Cosine Rule, 9.2 The Sine Rule, 9.3 Areas of Triangles, 9.4 Solving Triangle Problems, 9.5 Graphs of Sine, Cosine and Tangent, and 9.6 Transforming Trigonometric Graphs. Each one has a worked solution and a mark scheme showing where the marks go.

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