Calculate the dot product Ā·Ê(where Ê = Ē/E ~ is the unit vector in the direction of Ē ) and plot both Ā and Ê, showing how Ā·Ê is the projection of Ā on Ê.

Question

Ā= −4ˆi + 3ˆj
Ē= 12ˆi + 5ˆj