Mathematics
Senior High
求這題三角形面積的解法 我只能算出cos算不出sin不知道怎麼解 詳解寫很爛
答案:根號11
以在△ABC 中,若 AB=3、BC=√5、CA=4,則△ABC的面積為
ə
B √5
C
COSLBAC =
9416-5
2x3x4
二
246
5-3K-2-5-¹ 1500
解答本 P.94
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