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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

Trigonometric Functions in Right Triangle. Values of the trigonometric functions for any angle. Trigonometric identities. Angular measure of angle. Definition of trigonometric function of any angle. Signs of the trigonometric functions in four quadrants. Trigonometric functions of sum and difference of two angles. Trygonometric reduction formulas. Sum and difference of the trigonometric functions. Graph of the function y = sin x. Graph of the function y = cos x. Graph of the function y = tan x. Graph of the function y = tan x.