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USPshnik [31]
3 years ago
9

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

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
4 0

Answer and Step-by-step explanation:

90ft = a

55ft = b

50ft = c

Plug into equation.

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

29.4° is the answer.

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