若tana=1/2,则tan(a+pai/4)=

问题描述:

若tana=1/2,则tan(a+pai/4)=

tan(a+pai/4)=(tana+tanpai/4)/(1-tana*tanpai/4)
=(1/2+1)/(1-1/2*1)
=(3/2)/(1/2)
=3