Wednesday, November 30, 2016

Point

Point
Pointer
Dot Product
Producto Punto
6ᐧT
Sixty
120
360
Point Judith
Poinsettia
Punta Cana

Gen.6:6
 "And it repented the LORD that he had made man on the earth, and it grieved him at his heart."


"This is a point that passes by too easily, so I propose to belabor it."~~~William Dean Howells




"Geoff pointed the way and they set off"~~~Malcolm Lowry




 "He always kept his poise
to the top branches, climbing carefully"~~~Robert Frost






 German shorthaired pointer













 Poinsettia














 Dot Product (Producto Punto)
The dot product of aa with unit vector uu, denoted auau, is defined to be the projection of aa in the direction of uu, or the amount that aais pointing in the same direction as unit vector uu. Let's assume for a moment that aa and uu are pointing in similar directions. Then, you can imagine auau as the length of the shadow of aa onto uu if their tails were together and the sun was shining from a direction perpendicular to uu. By forming a right triangle with aa and this shadow, you can use geometry to calculate that
(1)au=acosθ,
where θ is the angle between a and u.











 Punta Cana, República Dominicana












Point Judith Lighthouse and Coast Guard Station, Rhode Island 



Chess:  "Point" "Pointer" "Dot Product" "Producto Punto" "6ᐧT" "Sixty" "120" "Point Judith" "Poinsettia" "Punta Cana" "360"