# Archive

**December, 2020**

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Geometric sequences and sums. Infinite geometric series (Algebra)

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Arithmetic sequences and sums (Algebra)

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Factoring rules in algebra (Algebra)**November, 2020**

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Finding equation of the line that is parallel to given one (Algebra)

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How to find slope, when two function points is given? (Algebra)

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Finding equation of the line that passes though the two points (Algebra)

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Drawing graph of the exponential function (Algebra)

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Basic laws of calculating exponents (Algebra)

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Drawing graph of the quadratic equation (Algebra)

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Absolute value. Useful properties and graph (Algebra)

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Basic properties of radicals (Algebra)

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Finding equation of the line that is perpendicular to given one (Algebra)

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Write linear function equation, when we have a slope and one point (Algebra)

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Quadratic equations. Vieta's formulas (Algebra)

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Quadratic equations. The discriminant (Algebra)

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Basic properties of logarithms (Algebra)

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Short multiplication formulas [Polynomial identities] (Algebra)

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Sum and differences identities (Trigonometry)

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Product to sum identities (Trigonometry)

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Sum to product identities (Trigonometry)

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Half angle identities (Trigonometry)

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Double angle identities (Trigonometry)

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Pythagorean identities (Trigonometry)

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Quotient identities (Trigonometry)

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Reduction formulas (Trigonometry)**March, 2019**

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Exact values of trigonometric functions (Trigonometry)

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Signs of trigonometric functions (Trigonometry)

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Lower and upper quartiles of the data set. Interquartile range (Probability and statistics)

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Mean, mode, median and range of the data set (Probability and statistics)

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Probability of independent events (Probability and statistics)

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Table of basic indefinite functions integrals (Calculus)

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Basic formulas and rules of calculating derivatives (Calculus)

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Removing irrationality from the fractions (Algebra)

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Distance between two points (Geometry)**February, 2019**

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Midpoint coordinates of the given line segment (Geometry)