与平面 x-y-z+1=0 的夹角.
与平面 x-y-z+1=0-|||-的夹角.
10.试确定下列各组中的直线和平面间的关系:-|||-(1) dfrac (x+3)(-2)=dfrac (y+4)(-7)=dfrac (z)(3) 和 4x
直线 (x-1)/(-1) = (y-1)/(0) = (z-1)/(1) 与平面 2x + y - z + 4 = 0 的夹角为()A. $\frac{\pi
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是()。A.π/6B.π/4C.π/3D.π/2
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是()。A.π/6B.π/4C.π/3D.π/2
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是()。A.π/6B.π/4C.π/3D.π/2
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是( )。A.π/6B.π/4C.π/3D.π/2
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是( )。A.π/6B.π/4C.π/3D.π/2
[单选题]平面x-y+2z=8与平面2x+y+z=10的夹角是( )。A.π/6B.π/4C.π/3D.π/2