Indian Navy AA (Artificer Apprentice) Vectors & 3D Geometry — practice questions
4 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Indian Navy AA (Artificer Apprentice) Vectors & 3D Geometry in the app →If $(d,m,n)$ are direction cosines of a line, which relation must hold?If $(2,-3,6)$ are direction ratios of a line, then a set of direction cosines isIf $vec{a}$ and $vec{b}$ are non-zero vectors making an angle $theta$, then $vec{a} \cdot vec{b}$ isTwo non-zero vectors a and b are PERPENDICULAR if and only if: