若0
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 20:15:16
![若0](/uploads/image/z/7803418-58-8.jpg?t=%E8%8B%A50)
x){ѽ&H¨|Թ@-(%ZɎ)%y
RiZixdӆ=f/A2 B=@ Q[~OW$*55A<-0ID)MȂ:?[ivcl
Շe "!"/.H̳y ٌ
若0 若0
若0
00
又tan x=3tan y
则tan(x-y)=(tanx-tany)/(1+tanx*tany)
=2tany/(1+3tany*tany)
=2/(1/tany+3tany)
又1/tany+3tany≥2/根号3
则tan(x-y)≤根号3/3
则x-y≤π/6
即x-y≤30º