推 milkkiller :倍角公式:) 12/22 09:34
→ wu1212121212:角平分向量 12/22 10:57
→ towierc :謝謝兩位:) 我用看看 12/22 14:08
→ towierc :倍角公式方法我搞懂了,角平分向量還在想@@ 感謝! 12/22 14:12
→ towierc :角平分向量是利用兩點到角平分線等距離嗎@@ 12/22 14:20
→ theoculus :Q為PR弧中點,|OP|=|OR| => (OP向量+OR向量)//向量OQ 12/22 16:19
→ firejox :複數運算... 12/22 20:29
→ firejox :(3/5 + 4/5i)^2 = -7/25 + 24/25i 12/22 20:31
→ firejox :R = (-7/25 , 24/25) 12/22 20:31
→ theoculus :旋轉 12/22 23:35