They are unit vectors in the positive directions of the x and y axes.
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Vectors that sum to zero are coplanar and coplanar vectors sum to zero.
A matrix is a field of numbers with rows and columns (see example below). They can reperesent many different things and have numerous applications, especially in computer science. They can also be used in physics, as columns are often vectors that are analyzed together for one reason or another. Linear Algebra involves the study of matrices. Example: | 2 3 8 | | 5 6 1 | | 4 2 7 |
On the Cartesian plane x is the horizontal axis and y is the vertical axis and they intersect at right angles at the origin (0,0))
Sir Isaac Newton.
In polar coordinates, p = 1 - sin(theta)