Using the app

History, copying, files, the notebook, the library, presenting, exams, classes and Pro.

• See your past calculations in HistoryOpen the History panel to see every earlier calculation and result for the calculator you are using.
• Reuse an earlier resultSend a result from History back into the calculator so you can build on it.
• Copy results and the screen as text, LaTeX or an imageCopy a result, a whole calculator screen, or a history entry as plain text, nicer Unicode symbols, LaTeX or a picture.
• Save the screen or a graph as a PNG pictureSave what the calculator screen shows (or the graph you drew) as a picture file you can add to homework or slides.
• Import data from a spreadsheet into your listsBring numbers from a CSV, TSV, text file or spreadsheet (.xlsx) into the list memory of your calculator.
• Export your lists or table as a CSV fileSave your list data, or the table currently on screen, as a CSV file for a spreadsheet, or copy it as CSV text.
• Start a notebookThe Notebook is a page of text, math, plot and data cells that you can run, edit, save and share.
• Plot graphs and data in a notebookUse plot cells to draw functions, 3D surfaces, scatter plots with a fitted line, and histograms.
• Save, export and print a notebookSave a notebook file, export it as Markdown or a web page, or print it to paper or PDF.
• Browse the reference libraryFind shapes, formula cards, toolkits and labs, all in one searchable library.
• Try a formula with live numbers and send it to the calculatorOpen a formula card, change the values, and tap Calculate to put the expression on your calculator.
• Use the subject toolkitsThe toolkits are small interactive tools: a triangle solver, unit circle, conics explorer, distribution visualizer, chemistry tools and personal finance.
• Explore 3D graphing and the other Pro labsLabs are deeper visual tools: 3D graphing, calculus visuals, solids of revolution, physics units and vectors. 3D shapes can be viewed in AR on supported devices.
• Use the exam-style formula sheetsOpen a one-page formula sheet for algebra, geometry, precalculus, calculus, statistics or physics, and print it.
• Load a graph from the example galleryPick a ready-made graph, such as parabolas, trig waves, conics or a polar rose, and have it drawn for you.
• Switch between calculator modelsChange calculators with the Classic, Natural and RPN switch at the top, or choose any model from the list.
• Change skins, dark mode and display optionsPick a calculator skin, choose light or dark appearance, and switch display options like pixel-accurate graphs.
• Change the calculator layoutSwitch between the Device keypad and the Spread layout for big screens, and move or resize the display and key groups with Arrange.
• Type with your computer keyboardOn a computer, tablet keyboard or Chromebook, you can type numbers, operators and common functions instead of tapping the keys.
• Show the calculator on a projector or TVTeachers can show the calculator screen big, with a key history, a freeze button and a pointer. Use the Present window on a computer or connect a TV to an iPad.
• Practise with exam-style restrictionsExam practice hides features that many exam rooms do not allow, and can run a timer. It is for practice only and is not approved for real exams.
• Share a class setup with a link or QR codeTeachers can create a link or QR code that opens Trident on the right model, with a graph ready and optional exam practice. No accounts needed.
• What Trident Pro adds, and how to get itPro unlocks the financial and advanced models, premium skins, the Pro labs, notebook saving and unlimited step-by-step explanations.
• Restore a Pro purchase on a new deviceGot a new phone or reinstalled the app? Restore brings your Pro purchase back without paying again.
• Use Pro on the web with a pass codeTurn your iPhone or iPad Pro purchase into a pass code that unlocks Pro on the Trident website, in up to 3 browsers.
• Accessibility featuresScreen reader names for every key, keyboard use, a high-contrast skin, key tooltips and 15 languages.
• Change the app languageTrident is available in 15 languages. Change it in Settings; it applies at once.
• Get a step-by-step explanationSee how an equation, fraction, derivative or integral is worked out, one step at a time, from the History panel.
• Take the getting-started tourA short tour points out the main parts of the screen the first time you use the app. You can skip it and replay it later.