Contact us
Choose a category below so we can get back to you as quickly as possible.
(sinA+cosA)的平方=sinA的平方+cosA的平方+2*sinA*cosA=m的平方所以得出1+2*sinA*cosA=m的平方又因為sinA*cosA=n得出1+2n=m的平方
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.