1.

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

A. b² + a² - 2ac cos A
B. b² + c² - 2bc cos A
C. b² - c² + 3bc cos C
D. b³ + c³ - 2bc cos B
Answer» C. b² - c² + 3bc cos C


Discussion

No Comment Found

Related MCQs