Contact us
Choose a category below so we can get back to you as quickly as possible.
a、b兩個向量之差與兩個向量之和的叉乘還是一個向量. 幾何意義是:右手四指與被减向量方向相同向减向量方向彎曲,大拇指的方向就是其方向,大小是這兩個向量所圍平行四邊形的面積的兩倍.因為: (a-b)×(a+b)=a×a+a×b - b×a - b×b =0+a×b+a×b - 0 =2a×b
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.