mathinschool.com
numbers and algebraic expressions
logic, sets, intervals
absolute value
function and its properties
linear function
quadratic function
polynomials
rational function
exponential function
logarithm
number sequences
limits of sequences and functions
derivative and integral of functions
trigonometry
plane geometry
analytic geometry
solid geometry
combinatorics
probability
elements of statistics
kropki game
The Function is periodic, if its graph can split into infinitely identical parts. The period of a function - length of one part into which graph of a function can be split. Examples of periodic functions: y = sin x, y = cos x, y = tan x, y = cot x, y = x - [x].