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numbers and algebraic expressions
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function and its properties
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exponential function
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derivative and integral of functions
trigonometry
plane geometry
analytic geometry
solid geometry
combinatorics
probability
elements of statistics
kropki game

c = a × b. The result of cross product of vectors "a" and "b" is vector "c". Magnitude "c". c = |a||b|sinα. α - angle between vectors "a" and "b". |a|, |b|, |c| - magnitude of vectors. Direction "c" is at the same time perpendicular to "a" and "b". We find it on the base corkscrew rule. Turn corkscrew from "a" to "b".