设tana=x 则：sin(arctanx)=sina sina/cosa=x cosa=sina/x sin²a+cos²a=1 sin²a+sin²a/x²=1 sin²a=x²/(x²+1) sina=±根号[x²/(x²+1)] sin(arctanx)=sina=±根号[x²/(x²+1)]
sinarctanx=?cosarctanx=?tanarcsinx=?tanarcc
设tana=x 则：sin(arctanx)=sina sina/cosa=x cosa=sina/x sin²a+cos²a=1 sin²a+sin²a/x²=1 sin²a=x²/(x²+1) sina=±根号[x²/(x²+1)] sin(arctanx)=sina=±根号[x²/(x²+1)]
sinarctanx=?cosarctanx=?tanarcsinx=?tanarcc名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
