Contact us
Choose a category below so we can get back to you as quickly as possible.
原式=[2cos(60-5)-√3sin5)]/cos5 =[2(1/2cos5+√3/2sin5)-√3sin5]/cos5 =(cos5+√3sin5-√3sin5)/cos5 =cos5/cos5 =1
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.