Question using the Sine Rule and Bearings

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SUMMARY

The discussion focuses on solving a geometry problem involving the Sine Rule and bearings in a scalene triangle formed by three towns, D, E, and F. The bearing of F from D is established at 48 degrees, with distances D to E measuring 640m and E to F measuring 430m. The participants worked through various angles, specifically angles DFG, GFE, and DFE, while also calculating angle EDF and the bearing of E from D. The Sine Rule formula, a/sinA = b/sinB = c/sinC, is central to the calculations.

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  • Understanding of the Sine Rule in trigonometry
  • Knowledge of bearings and their application in navigation
  • Ability to solve for angles in triangles
  • Familiarity with scalene triangles and their properties
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  • Study the application of the Sine Rule in various geometric problems
  • Learn how to calculate bearings and their significance in navigation
  • Explore the properties of scalene triangles and their angle relationships
  • Practice solving complex triangle problems using trigonometric identities
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Students studying geometry, mathematics educators, and anyone interested in applying trigonometric principles to real-world navigation and problem-solving scenarios.

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Homework Statement


3 towns are located at D,F & E; the vertices of an scalene triangle. The bearing of F from D is 48 degrees. D to E=640m and E to F=430m. Point G is located at the end of a south line at F.

a)i)Find angle DFG
ii) Find angle GFE
iii) Find angle DFE

b) Calculate angle EDF
c)Calculate the bearing of E from D
d)What is the distance between D & F


Homework Equations


a/sinA=b/sinB=c/sinC


The Attempt at a Solution


a)i) I got 48 degrees because I used a z-angle
ii) This is the one I can't get so I can't do the rest. I've tried quite a few ways but can't seem to get it so there must be something I'm missing.
 
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I've got it now there was angle missing from the diagram :L
 

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