cristian691023
05.05.2020 •
Mathematics
Whoever is looking at this, please help me. i'll give you 19 points!
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Ответ:
c² = a² + b² - 2 a b cos C
2 a b cos C = a² + b² - c²
cos C = (a² + b² - c²) / 2ab
C = arccos( (a² + b² - c²) / 2ab )
C = arccos( (17² + 8² - 16²) / (2 (17)(8) ) )
C ≈ 69.11°
69.1
Ответ: