jessisaacs04 jessisaacs04

19-02-2021
Mathematics

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find c and round to the nearest tenth. thank you in advance

find c and round to the nearest tenth thank you in advance class=

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Аноним Аноним

19-02-2021

Answer and Step-by-step explanation:

90ft = a

55ft = b

50ft = c

Plug into equation.

[tex]50^{2} = 90^{2} + 55^{2} - 2(90)(55)cosC\\\\2500 = 11125 - 9900(cosC)\\\\-8625 = -9900(cosC)\\\\0.8712 = cosC\\\\cos^{-1} (0.8712) = C\\\\29.4[/tex]

29.4° is the answer.

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