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Trigonometric Ratios

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Question 31

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=13BD = CD = 13BD=CD=13 cm

a.

Show that AC2−15AC+56=0AC^2 - 15AC + 56 = 0AC2−15AC+56=0

[2]
b.

Hence find the length of ACACAC

[1]
c.

Hence, or otherwise, find the length of ABABAB

[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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