Answer:
a·b = 7.2
Step-by-step explanation:
Given :
IaI = 2; IbI = 4 , [tex]\theta = -\pi/7[/tex]
Using Dot product formula:
a·b = IaI IbI cos [tex](\theta)[/tex]
a·b = (2) (4) (cos(-\pi/7[/tex])
a·b = 7.2
Hence Dot product of vector a and b i s:
a·b = 7.2
