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Cosine Rule Learning App Download - Class 8 Math Apps (iOS & Android)

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Cosine Rule Quiz App Download & e-Book PDF - 13

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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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