xsina+y+2=0
y = (-sina)x -2
斜率:-sina
-1 ≤ sina ≤ 1
-1 ≤ -sina ≤ 1
斜率的范围是[-1,1]
倾斜角范围是[-45˚,45˚]
直线xsina+y+2=0的倾斜角范围是?斜率的范围是?
xsina+y+2=0
y = (-sina)x -2
斜率:-sina
-1 ≤ sina ≤ 1
-1 ≤ -sina ≤ 1
斜率的范围是[-1,1]
倾斜角范围是[-45˚,45˚]