HELLO,
Given that, \(|\vec{a}| =a\) and \(|\vec{b}|=b\)
Also given that \(\vec{a}*\vec{b}=0
\)
\(|\vec{a}||\vec{b}|\sin \theta=0\) where \(\theta\) is the angle between \(\vec{a}\) and \(\vec{b}\).
\(\sin \theta =0\)
\(\theta =0\)
We have to find \(\vec{a}.\vec{b}\)
\(\vec{a}.\vec{b} = |\vec{a}||\vec{b}| \cos \theta\)
\(= ab\cos0\)
\(\vec{a}.\vec{b}=ab\)
I HPE YOU WILL UNDERSTAND.
