The direction cosines of the line joining the points $$(-2,4,-5)$$ and $$(1,2,3)$$ are

The points (2, 3, 4), ($$-$$1, $$-$$2, 1) and (5, 8, 7) are

The sum of intercepts of the plane $$4 x+3 y+2 z=2$$ on the coordinate axes is

If the lines, $$\frac{x-3}{2}=\frac{y-2}{3}=\frac{z-1}{\lambda}$$ and $$\frac{x-2}{3}=\frac{y-3}{2}=\frac{z-2}{3}$$ are coplanar, then $$\sin ^{-1}(\sin \lambda)+\cos ^{-1}(\cos \lambda)$$ is equal to