[中學] 三角函數
設定X為銳角, 且2sinX+cosX=2
求sinX與cosX
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推
11/08 10:40, , 1F
11/08 10:40, 1F
推
11/08 10:46, , 2F
11/08 10:46, 2F
→
11/08 10:51, , 3F
11/08 10:51, 3F
→
11/08 11:03, , 4F
11/08 11:03, 4F
→
11/08 11:42, , 5F
11/08 11:42, 5F
→
11/08 11:58, , 6F
11/08 11:58, 6F
推
11/09 16:03, , 7F
11/09 16:03, 7F
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