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Class 8 Math MCQs – Certification Test 13

Cosine Rule Trivia (Question 13) – Study App & e-Book Download

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MCQ 13: For the Cosine Rule of any triangle ABC, the b² is equal to:

  1. a² - c² + 2ab cos A
  2. a³ + c³ - 3ab cos A
  3. a² + c² - 2ac cos B
  4. a² - c² 4bc cos A
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