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Class 8 Math MCQs – Certification Test 64

Cosine Rule Quiz (Question 64) – Study App & e-Book Download

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MCQ 64: For the Cosine Rule of any triangle ABC, the a² is equal to:

  1. b² + c² - 2bc cos A
  2. b² + a² - 2ac cos A
  3. b³ + c³ - 2bc cos B
  4. b² - c² + 3bc cos C
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