<P> Two main kinds of vector multiplications were defined, and they were called as follows: </P> <Ul> <Li> The direct, scalar, or dot product of two vectors </Li> <Li> The skew, vector, or cross product of two vectors </Li> </Ul> <Li> The direct, scalar, or dot product of two vectors </Li> <Li> The skew, vector, or cross product of two vectors </Li>

What is the length of the sum of two perpendicular unit vectors