Mathematics
Senior High
数学 ここの計算方法が分かりません
どのようにしたら下の矢印のようになりますか？
DE
-AE+AD -2AE AD cos Z EAD
=
51 \2
17\2
51
17
-(16)+(47) -2.36 17 32
=172.72
16 4 &
162.22
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