Find the component of vecr in the direct...

Find the component of `vecr` in the directioln of `veca` :-

`((vecr.veca)veca)/(a^(2))`

`((vecr.veca)veca)/(a)`

`((vecr.veca)vecr)/(r)`

`((vecr.veca)vecr)/(r^(2))`

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