Texas Instruments

The TI-Nspire CX II for IB Maths: the five skills every paper needs

Everything lives in applications (Calculator, Graphs, Lists & Spreadsheet) and the menu key opens a numbered menu that changes with the application. Learn the numbers: typing menu 6 5 2 is faster than scrolling.

Exam status. Allowed in IB exams. The CX II CAS model is only allowed with CAS disabled in Press-to-Test mode, which your school sets up before the exam. If you have the CAS model, make sure the Press-to-Test light is on before you start.

normalcdf · invNorm

Normal distribution on the TI-Nspire CX II

Calculator page, menu, 6 Statistics, 5 Distributions, then 2 Normal Cdf or 3 Inverse Normal. Arguments: lower, upper, mu, sigma.

menu6: Statistics5: Distributions

Full steps, worked example, interactive checker and what to write

binompdf · binomcdf

Binomial distribution on the TI-Nspire CX II

menu, 6 Statistics, 5 Distributions, then D Binomial Pdf or E Binomial Cdf. The Cdf takes a lower AND an upper bound, so "between" needs no subtraction.

menu6: Statistics5: DistributionsD: Binomial Pdfn: 20p: 1/6X Value: 4OK

Full steps, worked example, interactive checker and what to write

linear regression · exponential regression

Regression and correlation on the TI-Nspire CX II

Lists & Spreadsheet page: name the columns, type the data, then menu, 4 Statistics, 1 Stat Calculations, and pick the model. r shows automatically.

ctrldoc4: Add Lists & SpreadsheetA: tB: nmenu4: Statistics1: Stat Calculations

Full steps, worked example and what to write

nSolve · polynomial roots

Solving equations on the TI-Nspire CX II

Calculator page: menu, 3 Algebra, 1 Numerical Solve for one equation; 3 Polynomial Tools, 1 Find Roots of Polynomial for all roots. Graphs page: menu, 6 Analyze Graph, 4 Intersection.

menu3: Algebra3: Polynomial Tools1: Find Roots of PolynomialDegree: 3a3=1, a2=−4, a1=1, a0=3OKmenu3: Algebra1: Numerical SolvenSolve(e^(x)=3−x,x,1)enter

Full steps, worked example and what to write

TVM solver · finance solver

TVM and finance solver on the TI-Nspire CX II

Calculator page: menu, 8 Finance, 1 Finance Solver. Fill six fields, put the cursor on the seventh and press enter.

menu8: Finance1: Finance SolverN: 60I(%): 4.8PV: 12000FV: 0PpY: 12CpY: 12PmtAt: END

Full steps, worked example and what to write

The other calculators

Written by Pietro Meloni, PhD, IB Mathematics and Physics tutor. Keystrokes checked on TI-Nspire CX II OS 6, Casio fx-CG50 OS 3 and TI-84 Plus CE OS 5; older systems may number the menus differently. Not affiliated with the International Baccalaureate Organization, Texas Instruments or Casio. Found a key that has moved? Write to pietro@pietromeloni.com.

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