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28-01-2020
Mathematics

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Complete the following equation: a2 = b2 + c2 - ______.
2 bc cos A
2 ca cos B
2 ab cos C
none of the above

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Onoriodefelix Onoriodefelix

28-01-2020

Answer:

2 bc cos A

Step-by-step explanation:

Cosine rule

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