AngleVector

AngleVector[θ] gives the list representing the 2D unit vector at angle θ relative to the x axis.

AngleVector[{r,θ}] gives the list representing the 2D vector of length r at angle θ.

AngleVector[{x,y},θ] gives the result of starting from the point {x,y}, then going a unit distance at angle θ.

AngleVector[{x,y},{r,θ}] gives the result of starting from the point {x,y}, then going distance r at angle θ.

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