The diagram shows the positions of three points $$\(A, B\)$$ and $$\(C\)$$ in a field. Calculate angle $$\(A B C\)$$. Angle $$\(A B C=\)$$ ............................................
Exam No：0580_s20_qp_41 Year：2020 Question No：7(b)
Answer:
\(67.8\) or \(67.9\) or \(67.83\) to \(67.88\)
Knowledge points:
E6.4 Solve problems using sine and cosine rules and the area formula for triangles.
Solution:
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