tan(2x+y)=tan[(x+y)+x]
tan(2x+y)=[tan(x+y)+tanx]/[1-tan(x+y)tanx]
3=[tan(x+y)+5]/[1-5tan(x+y)]
3-15tan(x+y)=tan(x+y)+5
16tan(x+y)=-2
tan(x+y)=-1/8
若tan(2x+y)=3,tanx=5,則tan(x+y)等于多少
若tan(2x+y)=3,tanx=5,則tan(x+y)等于多少
數(shù)學(xué)人氣:899 ℃時(shí)間:2020-05-24 03:59:06
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