Contact us
Choose a category below so we can get back to you as quickly as possible.
sin(A+B)=1 A+B=2kπ+π/2 2A+2B=4kπ+π tan(2A+2B)=tan(4kπ+π)=0 tan[(2A+B)+B]=0 所以[tan(2A+B)+tanB]/[1-tan(2A+B)*tanB]=0 所以tan(2A+B)+tanB=0
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.