Mathematics
Senior High
問題2の解く手順がわかりません
細かく教えてくれると助かります。
お願いします。
72
B
2
のとき, sin(a - 90) の値を求めよ。
aは鈍角で sin a
ニ
8 △ABC において, 次の等式を証明せよ。
(6-c) sin A + (c-a)sin B+ (a-b) sin C =0
4. △ABCが,acos A+bcos B = ccos C を満たすとき,ど
co
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