Khan - Linear Algebra Flashcards
1
Q
What is a vector?
What is a scalar?
A
A vector is an object that has both a magnitude and a direction.
Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
2
Q
What is the magnitude of a vector?
A
It’s size or the length of a vector.
Magnititude is denoted as ||a|| for vector a
3
Q
What is a unit vector?
A
A vector of magnitude 1
4
Q
What is the direction of a vector?
A
The direction of a vector is the angle made by the vector with the horizontal axis, that is, the X-axis
