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Math worksheet focused on applying the Cosine Rule to find missing sides and angles in triangles.

Educational worksheet: Trigonometry worksheets and PowerPoints. Download and print for classroom or home learning activities.

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Final Answer:
The missing length or angle in each triangle can be found using the Cosine Rule. For example, in Section A, problem 1: side a ≈ 5.67 cm; problem 2: side a ≈ 13.8 cm; problem 3: side a ≈ 7.46 cm. (Answers are rounded to 3 significant figures.)

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