Mathematics
Senior High
Solved
cosBの計算合わないので😭
教えてください🙇♀️
答えは√3/2です
習 196 次のような △ABCにおいて、残りの辺の長さと角の大きさ
1) a= 2√6, b=√6, c=3√2
COSA = b²³c²_a²
cos B=
c²ta² - 6²
2 ca
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約分すればいいんですね!
ありがとうございます🙇♀️