Mathematics
Senior High
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数学Ⅰの三角形の問題を教えてください！🙇🏻♂️
⑪次の図で cos Aを求めなさい。
11
次の図で cos Aを求めなさい。P89例題3~
P91 問6を参照
(3点)
C
10
3
A
B
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