TRIGONOMETRY GLOSSARY
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Title  Description  

Ngon  When a polynomial has so many sides that we cannot easily remember its name, we just take the number of sides (n) and add "gon" to our characterization, as a 16sided polygon would be called a "16gon."  
Negative Reciprocal  The product of two Negative Reciprocals is 1. When lines in Cartesian or rectangular coordinates meet at right angles they have Negative Reciprocal slopes, unless they are precisely horizontal and vertical. 

Noncollinear  Not linear, not aligned, not part of the same line. Not collinear. 

NonEuclidean  A geometry in which the Parallel Postulate does not hold may be termed a NonEuclidean geometry. In such a geometry, the shortest distance between two points may not be a straight line. 

Nonagon  A ninesided polygon. 

Norm  The heavyset guy from the Boston tavern Cheers. Actually, its either a kind of average or a length. 

Normal  Usually meaning orthogonal (as to a plane), Normal sometimes means also merely perpendicular. 

Normalize  We might Normalize data by culling errors. Or we might Normalize a vector by assigning a unit vector in its direction. 

Nth Root  Given some integer N and a real value, the Nth Root of the real value is the number that when raised to the N power returns the real value. 

Nu  Nu is the 13th letter of the Greek alphabet. 
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