The straight lines `(x-3)/(2)=(y+5)/(4)=(z-1)/(-13)and(x+1)/(3)=(y-4)/(5)=(z+2)/(2)` are

The lines (x-2)/(1)=(y-3)/(2)=(z-4)/(3)and(x-1)/(-5)=(y-2)/(1)=(z-1)/(1) are

The lines (x-2)/(1)=(y-3)/(2)=(z-4)/(3) and (x-1)/(-5)=(y-2)/(1)=(z-1)/(1) are

The angle between the straight lines (x+1)/(2)=(y-2)/(5)=(z+3)/(4) and (x-1)/(1)=(y+2)/(2)=(z-3)/(-3) is

The angle between the straight lines (x+1)/(2)=(y-2)/(5)=(z+3)/(4) and (x-1)/(1)=(y+2)/(2)=(z-3)/(-3) is

Equation of the plane containing the straight line (x)/(2)=(y)/(3)=(z)/(4) and perpendicular to the plane containing the straight lines (x)/(2)=(y)/(4)=(z)/(2) and (x)/(4)=(y)/(2)=(z)/(3) is

Equation of the plane containing the straight line (x)/(2)= (y)/(3)= (z)/(4) and perpendicular to the plane containing the straight lines (x)/(3)= (y)/(4)= (z)/(2) and (x)/(4) = (y)/(2) = (z)/(3) is

The lines (x-2)/(1)=(y-3)/(1)=(z-4)/(-k) and (x-1)/(k)=(y-4)/(2)=(z-5)/(1) are coplanar, if

The lines (x-2)/(1)=(y-3)/(1)=(z-4)/(-k) and (x-1)/(k)=(y-4)/(2)=(z-5)/(1) are coplanar, if