## Scalar Product

Given two vectors the scalar product, the length of the two vectors and the included angle are calculated.

### Example:

-> | 1 | -> | 5 |
a = | 3 | b = | 0 |
| 1 | | 3 |
Scalar product of the vec. = 8
Length of the first vector = 3.32
Length of the second vector = 5.83
included angle α = 65.56°

### See also:

Wikipedia: Dot product