(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m
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![(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m](/uploads/image/z/1990899-27-9.jpg?t=%EF%BC%883-7m%2B2m%26%23178%3B%EF%BC%89x-%EF%BC%889-m%26%23178%3B%EF%BC%89y%2B3m%26%23178%3B%3D0%2C%E5%80%BE%E6%96%9C%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E5%80%BC2%E5%88%86%E4%B9%8B%E6%A0%B9%E5%8F%B72%2C%E6%B1%82m)
(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m
(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m
(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m
设倾斜角为α
sinα=√2/2
∴α=45°或α=135°
直线的斜率为1或-1
∴3-7m+2m²=9-m²或3-7m+2m²+9-m²=0
解得m=3或m=4或m=-2/3
-3