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Mathematics

Mathematics lessons from algebra to calculus, with worked examples for AP Calculus, Cambridge 9709 and IB Analysis and Approaches.

MathematicsThe Harmonic Form R cos(x − α): Combining a sin x + b cos x, with Tides and Maximum ValuesLearn the harmonic form R cos(x − α): combine a sin x + b cos x, find maximum and minimum values, and solve equations, with a…3 Nov 2026, 11 min readMathematicsSolving Trigonometric Equations: All Solutions in an Interval, with a Daylight-Hours ModelSolving trigonometric equations: find all solutions in an interval using the CAST diagram, quadratics in sin x and cos x, and a daylight-hours model.3 Nov 2026, 10 min readMathematicsBinomial Expansion Explained: Pascal’s Triangle, nCr and Approximations like 1.02¹⁰Binomial expansion explained: use Pascal's triangle and nCr to expand (a + b)^n, find a single term, and approximate values like 1.02¹⁰ with worked examples.2 Nov 2026, 9 min readMathematicsFactor Theorem and Remainder Theorem: Polynomial Division Step by Step, with a Box-Volume CaseLearn the factor theorem and remainder theorem: find remainders, factorise cubics with synthetic division, and solve a box-volume design case step by step.1 Nov 2026, 11 min readMathematicsComposite and Inverse Functions: How to Find f(g(x)) and f⁻¹(x), with Currency and Tax ExamplesLearn composite and inverse functions step by step: find f(g(x)) and f⁻¹(x), restrict domains, and solve a currency and tax case with worked examples.1 Nov 2026, 13 min readMathematical EconomicsL’Hôpital’s Rule Explained: 0/0 and ∞/∞ Limits, Repeated Use and When It FailsLearn L'Hôpital's rule for 0/0 and ∞/∞ limits: when it applies, repeated use, when it fails, plus a present-value case and exam-style practice questions.1 Nov 2026, 11 min readMathematicsCompleting the Square: Vertex Form, Maximum Revenue and Circle EquationsWhat ticket price brings in the most money? Completing the square answers it in four lines, then solves quadratics and circle equations too.31 Oct 2026, 10 min readMathematicsMaclaurin Series: Approximating eˣ, sin x and ln(1 + x), with a Continuous Compounding CaseHow much does continuous compounding really add? Use a Maclaurin series to find out to the cent, with error bounds, worked examples and exam practice.30 Oct 2026, 11 min readMathematical EconomicsNewton–Raphson Method: Finding an Investment’s IRR Step by StepSolar panels cost $8,000 and save $2,000 a year. What return do they earn? Use the Newton–Raphson method to find the IRR in three quick steps.30 Oct 2026, 12 min readMathematicsVolume of Revolution: Disc and Washer Methods, Worked Through a Wine GlassWhere should the 175 ml line go on a wine glass? Learn the disc and washer methods for volume of revolution with worked examples and exam…29 Oct 2026, 13 min read
Mathematics Made Simple complete bundle cover
This topic has a full chapter in Mathematics Made Simple, with 1,565 fully worked practice questions in the bundle.Mathematics Made Simple Complete Bundle — Textbook + 1,565 Practice Questions
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