Chapter 7: Trigonometry & Trigonometry Formulas - Math Mcqs for Grade 8

Q.  For the Cosine Rule of any triangle ABC, the a² is equal to

a. b² + c² - 2bc cos A
b. b² + a² - 2ac cos A
c. b³ + c³ - 2bc cos B
d. b² - c² + 3bc cos C


ANSWER: See Answer
 
No explanation is available for this question!
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