What actually means by scalar dot product of two vectors a and b.

What actually it signifies and how to understand that?

Thanks.

2. ## Re: about dot product

Hi arangu1508!

I believe wikipedia explains it better than I could:
Dot product - Wikipedia, the free encyclopedia

Or did you have more specific questions?

3. ## Re: about dot product

The explanation that is the most easy to visualize:
the dot product is a scalar projection of vector A onto vector B.

If you think of it this way, then for example the following properties of the dot product become intuitively clear:
-if vectors A and B are parallel, then the dot product is equal to the length of vector A.
-if vectors A and B are perpendicular, then the dot product is zero-
-the dot product can never be larger than the length of vector A