Mathematics

Problem

Which one of the following correctly gives the scalar component of a vector

\vec A

along another vector

\vec B

? a)

\dfrac{\vec A\cdot\vec B}{|\vec A|}

|\vec A|\sin\phi

\dfrac{\vec A\cdot\vec B}{|\vec B|}

\dfrac{\vec A\cdot\vec B}{|\vec B|^{2}}