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Vector - Monomath Math Dictionary
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Vector

Algebra

๐Ÿ“– Definition

A vector is a quantity with both magnitude and direction, represented geometrically as an arrow.

๐Ÿ“ Detailed Explanation

Vectors are written as v = โŸจx, yโŸฉ in 2D or v = โŸจx, y, zโŸฉ in 3D. Vector operations include addition, subtraction, scalar multiplication, dot product, and cross product. Vectors describe displacement, velocity, force, and acceleration in physics.

๐Ÿ“ Formula

|v| = โˆš(xยฒ + yยฒ)  |  aยทb = |a||b| cos ฮธ

๐Ÿ“œ History & Origins

Vector concepts emerged in the 19th century. William Rowan Hamilton developed quaternions (1843). Josiah Willard Gibbs and Oliver Heaviside independently developed modern vector analysis around 1880.

๐Ÿ”— Related Terms

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