Contact us
Choose a category below so we can get back to you as quickly as possible.
除可用一樓那樣的“三角代換法”外,亦可用代數方法直接證明:因a、b為非負實數,根號(1-a^2)*根號(1-b^2)=ab ==>(兩邊平方,整理)a^2+b^2=1;故,a根號(1-b^2)+b根號(1-a^2)=a根號a^2+b根號b^2=a^2+b^2=1.證畢.
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.