(3-7m+2m²)x-(9-m²)y+3m²=0,倾斜角的正弦值2分之根号2,求m

来源:学生作业帮助网 编辑:作业帮 时间:2024/03/29 20:00:56
(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

(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