平面向量的数量积
一、平面向量数量积的含义
1.平面向量数量积的运算
1.已知<Object: word/embeddings/oleObject1.bin>
; (2)
<Object: word/embeddings/oleObject2.bin>
;(3)
<Object: word/embeddings/oleObject3.bin>
的夹角为
<Object: word/embeddings/oleObject4.bin>
,分别求.2.△ABC中，<Object: word/embeddings/oleObject5.bin>
，<Object: word/embeddings/oleObject6.bin>
，<Object: word/embeddings/oleObject7.bin>
，则<Object: word/embeddings/oleObject8.bin>
_________
3.在<Object: word/embeddings/oleObject9.bin>
中，已知
<Object: word/embeddings/oleObject10.bin> ...