Considering Cosine rule, cos C is equal to – McqOptions

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1.	Considering Cosine rule, cos C is equal to
A.	a² - b² - c²⁄2bc
B.	a² + b² - c²⁄2ab
C.	2a + 2b - 2c⁄2ac
D.	2a² + 2b² + 2c²⁄2abc
Answer» C. 2a + 2b - 2c⁄2ac

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