
Calculus
 R
Calculus answers two main questions about functions. (1) How steep is a function at a point? (2) What is the area under the graph over some region?
The first question is answered using the derivative and to answer the second question we use the integral.
http://qindex.info/d.php?c=5079#5210


Cross Product
 R
Given two nonzero vectors in two or three dimensions, their cross product is a vector with magnitude equal to the product of the magnitudes of the vectors times the sine of the angle between the vectors and direction perpendicular to the vectors.
http://qindex.info/d.php?c=5079#5291


Logarithm
 R
By definition, when we say "log base b of x equals y", that's the same thing as saying "b to the y equals x".
So if you want to find log base b of x, you're asking "what power do you have to raise b to in oder to get x?"
http://qindex.info/d.php?c=5079#5065


Plane
 R
By stringing an infinite number of lines along a dimension perpendicular to the line, a twodimensional object called a plane can be obtained. And then if we string an infinite number of planes in either direction, we get three dimensional space.
http://qindex.info/d.php?c=5079#5031


Point
 R
A point is nothing more than a location in space. It is zerodimensional, meaning that it has no dimensions of any kind. We represent points with dots and some capital letter.
http://qindex.info/d.php?c=5079#5030


Space
 R
By stringing an infinite number of lines along a dimension perpendicular to the line, a twodimensional object called a plane can be obtained. And then if we string an infinite number of planes in either direction, we get three dimensional space.
http://qindex.info/d.php?c=5079#5178

