Question

Dot product help? Find a(dot)b if you know |a|=7 and |b|=6 and the angle between a and b is Pi/5

Answer 1

Find a(dot)b if \[\left| a \right|=7\] and \[\left| b \right|=6\] and \[the \angle\] between a and b is \[\frac{ \pi }{ 5 }\]