NCEA Level 3
Maths89 lessons
Complex numbers · AS 91577
Complex arithmetic, conjugates and equating partsVideoPolar form by hand: modulus, argument and quadrantsVideoDe Moivre's theorem: powers and roots of complex numbersVideoComplex roots of polynomials: factor theorem and conjugatesVideoAlgebra with k: quadratics, discriminants and surd equationsVideoComplex loci, purely real conditions and proofsVideoComplex arithmetic: 7 exam questions solved step by stepVideoPolar form: 7 exam questions solved step by stepVideoDe Moivre's theorem: 7 exam questions solved step by stepVideoComplex polynomials: 7 exam questions solved step by stepVideoAlgebra with constants: 7 exam questions solved step by stepVideoComplex loci and proof: 7 exam questions solved step by stepVideo
Differentiation · AS 91578
The derivative toolkit: chain, product and quotient rulesVideoStationary points, concavity and points of inflectionVideoTangents and normals: from gradient to finished equationVideoParametric differentiation, and the second derivativeVideoRelated rates of change: spheres, cones and the chain ruleVideoOptimisation: building the model and finding the max or minVideoLimits, continuity and differentiability from a graphVideoDerivative toolkit: 7 exam questions solved step by stepVideoStationary points: 7 exam questions solved step by stepVideoTangents and normals: 7 exam questions solved step by stepVideoParametric curves: 7 exam questions solved step by stepVideoRelated rates of change: 7 exam questions solved step by stepVideoOptimisation: 7 exam questions solved step by stepVideoLimits and continuity: 7 exam questions solved step by stepVideo
Integration · AS 91579
The integration toolkit: surds, e, trig and the chain ruleVideoIntegrating fractions: when it is ln, and when it is notVideoThe constant of integration: find c, never assume itVideoDefinite integrals and area, including between two curvesVideoTrapezium and Simpson's rules: numerical areasVideoDifferential equations: growth, decay and Newton's coolingVideoIntegration toolkit: 7 exam questions solved step by stepVideoIntegrating fractions: 7 exam questions solved step by stepVideoConstant of integration: 7 exam questions solved step by stepVideoDefinite integrals: 7 exam questions solved step by stepVideoNumerical integration: 6 exam questions solved step by stepVideoDifferential equations: 6 exam questions solved step by stepVideo
Statistical reports · AS 91584
Margin of error: the three rules of thumbVideoConfidence intervals, claims, and why overlap failsVideoExperiments vs observational studies: what you can concludeVideoSurveys and bias: sampling frames, non-response and wordingVideoEvaluating a statistical report: the full answerVideoMargin of error: 7 exam questions solved step by stepVideoConfidence intervals: 7 exam questions solved step by stepVideoStudy design: 7 exam questions solved step by stepVideoSurveys and bias: 7 exam questions solved step by stepVideoEvaluating reports: 7 exam questions solved step by stepVideo
Probability · AS 91585
Tables, trees and Venn diagrams from written informationVideoConditional probability from tables, trees and Venn diagramsVideoIndependent or mutually exclusive? The two testsVideoRelative risk: times as likely, and when you need a ratioVideoTrue probability, model estimates and experimental estimatesVideoOrganising information: 7 exam questions solved step by stepVideoConditional probability: 7 exam questions solved step by stepVideoIndependent or exclusive: 7 exam questions solved step by stepVideoRelative risk: 7 exam questions solved step by stepVideoProbability estimates: 7 exam questions solved step by stepVideo
Probability distributions · AS 91586
Choosing a distribution, and naming it every timeVideoDiscrete random variables: mean and standard deviationVideoBinomial and Poisson: at least, at most, and the rateVideoThe normal distribution: forwards, backwards and conditionalVideoUniform and triangular distributions, and judging a modelVideoChoosing a distribution: 7 exam questions solved step by stepVideoDiscrete random variables: 7 exam questions solved step by stepVideoBinomial and Poisson: 7 exam questions solved step by stepVideoNormal distribution: 7 exam questions solved step by stepVideoUniform and triangular: 7 exam questions solved step by stepVideo