26-03-2020
Mathematics

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Please help with law of cosines. Please mark brainliest

Please help with law of cosines Please mark brainliest class=

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kenlingdad kenlingdad

26-03-2020

Answer:

∠C = 27°

Step-by-step explanation:

AB² = BC² + AC² - 2 x BC x AC x cos ∠C

25 = 100 + 121 - 2 x 10 x 11 x cos ∠C

cos ∠C = 196 / 220 = 0.89

∠C = 27°

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