直线xtanπ/7-y-1=0的倾斜角a是?..

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直线xtanπ/7-y-1=0的倾斜角a是?..直线xtanπ/7-y-1=0的倾斜角a是?..直线xtanπ/7-y-1=0的倾斜角a是?..π/7tana=tanπ/7,a=π/7

直线xtanπ/7-y-1=0的倾斜角a是?..
直线xtanπ/7-y-1=0的倾斜角a是?..

直线xtanπ/7-y-1=0的倾斜角a是?..
π/7

tana=tanπ/7,
a=π/7