Projection of a vector a on another vector b is given by -
None of these
The correct option is C
We have seen that the projection of vector a on b will be a cosθLet’s check the options and see which gives usa cosθ a.b=|a|b| cosθ( We know that dot product of a & b is equal toa b cosθ) So, it’s not correct. Another option we have is -a.b|b| We know that \(a.b=|a||b|cos\theta\) so we’ll substitute this to the above expression - |a||b|cosθ|b|=|a|cosθ Which is what we wanted, so this option is correct.