tan105°-1/tan105°+1化简!

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tan105°-1/tan105°+1化简!tan105°-1/tan105°+1化简!tan105°-1/tan105°+1化简!(tan105°-1)/(tan105°+1)=[tan(180-7

tan105°-1/tan105°+1化简!
tan105°-1/tan105°+1化简!

tan105°-1/tan105°+1化简!
(tan105°-1)/(tan105°+1) =[tan(180-75)-tan45]/[1+tan45*tan(180-75)] =-(tan75+tan45)/(1-tan45*tan75) =-tan(75+45) =-tan120 =√3请采纳回答