lorihab1970
03.02.2021 •
Mathematics
Given m
|
n,
find the value of x.
m
n
(3x+3)° 84°
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Ответ:
a) is correct
b) CD = 15,1 cm
Step-by-step explanation:
The cosine law can be used here:
b² = d² + c² - 2dc*cosβ
b² = 18² + 12,1² - 2 * 18 * 12,1 * cos 56°
b = √226,82
b = 15,1 cm