已知tana=3,求tan（a+π/4）的值

来源：学生作业学帮网编辑：学帮网时间：2024/07/02 04:06:54

tan(a+π/4)
=(tana+tan(π/4))/[1-tana *tan(π/4)]
=(3+1)/(1-3*1)
=-2

tan(a+π/4)=(tana+tanπ/4)/(1+tana*tanπ/4)=(3+1)/(1+3*1)=1