Contact us
Choose a category below so we can get back to you as quickly as possible.
設兩平行向量分別為:向量A、向量B. 向量A·向量B=|A|·|B|·〈向量A,B夾角〉, 因為兩向量方向相反且平行,經平移,故其夾角為. 則cos180°=-1. 可得,向量A·向量B=-|A|·|B|. 所以兩平行且方向相反的向量乘積為向量A·向量B=-|A|·|B|. 剛才答快了,
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.