
Calculus
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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
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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


Line
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A point is nothing more than a location in space. It is zerodimensional. From here we can create a onedimensional object called a line by stringing an infinite number of points along a particular dimension.
http://qindex.info/d.php?c=5079#5177


Logarithm
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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
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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
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A point is nothing more than a location in space. It is zerodimensional. From here we can create a onedimensional object called a line by stringing an infinite number of points along a particular dimension.
http://qindex.info/d.php?c=5079#5030


Space
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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

