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10 cards from this deck
A quantity with size and direction.
Using the formula |a| = √(x^2 + y^2).
A vector with length 1, keeping the same direction.
Split into x and y parts, shown as (x, y).
Divide the vector by its magnitude.
Size: √(x^2 + y^2), Direction: tan^-1(y/x).
Add corresponding x and y components separately.
Subtract corresponding x and y components separately.
Pairs: (a, b); Columns: (a, b)^T.
The direction and length represent the vector.
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