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4434Gaussian Elimination
http://www.merlot.org/merlot/viewMaterial.htm?id=914328
Gauss elimination is a method of solving a system of linear equations. This site contains an interactive tool that performs Gauss elimination procedure one step at a time. The result is displayed after each step. A user can also use this tool to invert a matrix. iFactor Quadratics App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=910935
'This is a simple application that will factor quadratic equations, if possible. It's quick, handy, and easy. Example: 6x² + 13x + 6 = (2x+3)(3x+2).If you need to *solve* quadratics as well as factor them, you should check out iFactor and Solve Quadratics in the app store. It can handle any quadratic, including ones with complex roots.'This is a free appScientific Graphing Calculator App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=910936
'Features:1) Scientific Calculator. A lot of thought has gone into the design of the keyboard, which gives you everything you need while keeping the keys as large as possible. Available functions include the following:• the usual arithmetic functions and exponentiation.• square root, cube root, nth root, natural log, log base 10, log of arbitrary base, absolute value, factorial, permutations (nPr), combinations (nCr), modulus, random integer, bell curve, cumulative normal distribution.• Define and name your own constants• Summations• Complex numbers!• Sig figs (requires iOS 6; enable under settings)• Programmable keys (enable under settings)2) Graphing. Capabilities:• Graph up to nine equations at once.• Graphs are labeled.• You can drag the graph or pinch to zoom in or out.• Calculator can find roots and intersections.• Can graph in polar coordinates.• Can graph parametric equations.• Can graph parametric equations.• Can graph implicit functions, such as x^2+y^2-4=0. Most calculator apps can't do this!3) Vector and Matrix calculator. Vector dot and cross products. Multiply and add matrices. Determinant, transpose, Eigenvalues and Eigenvectors. 4) It can make a table of the values of any function you care to enter. You can choose the starting x value of the table, as well as how much x increases for each successive row.5) Triangle solver. Enter three sides, two sides and an angle, or two angles and a side, and the solver calculates the rest.6) Polynomial solvers. Find roots of linear, quadratic, or cubic polynomials.7) The reference hits the high points of the following subjects:algebra, calculus, geometry, trigonometry, vectors, vector calculus, and classical mechanics. So if you need a reminder of a trig identity . . . or the quadratic formula . . . or the chain rule from calculus . . . and so on, it's right there for you.8) A unit converter. Your data are in meters, and you need an answer in feet? No problem! With a tap, you can enter the result of your conversion into the calculator. Currently converts different units of the following: acceleration, angle, area, density, distance, energy, force, mass, power, pressure, speed, temperature, time, and volume. Great for physics problem sets! You can also define your own units.9) Constants for scientific calculations -- speed of light, strength of gravity at Earth's surface, etc. etc. etc. Tapping on a constant will insert it into your calculation -- i.e, you don't have to key in the value. Again, great for physics problem sets!10) Works on both iPhone and iPad.'This app costs $2.99Quick Graph: Your Scientific Graphing Calculator App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=910939
'Quick Graph is the best graphic calculator available on the AppStore! It is a powerful, high quality, graphic calculator that takes full advantage of the multitouch display and the powerful graphic capabilities of the iPad and iPhone, both in 2D and 3D. A simple, yet intuitive interface that makes it easy to enter and/or edit equations and visualize them in mathematical notation. It's capable of displaying explicit and implicit (opt) equations as well as inequalities (opt) in both 2D and 3D, in all standard coordinate systems: cartesian, polar, spherical and cylindrical, all with amazing speed and beautiful results, which can be copied, emailed or saved to the photo library.״It's ok to write yet another graphing app, so long as it is the best one. And this is״-- Review by RightyC1Please keep in mind that in this version, you now have to specify y=, x=, z= and so on, whenever you want to plot an equation.The advanced feature set gives you access to some of the new features, such as implicit graphs and tracing. You need to specify the dependent variable now, since just typing "x^2" without the y=, will assume the expression to be "x^2=0" and will try to plot it as an implicit graph.Up to 6 equations can be visualized simultaneously, in both 2D and 3D modes, this limitation can be removed by purchasing the advanced feature set. All the features from the original application are present and will remain free.It also includes an evaluate feature, to evaluate equations at specific points, as well as a library where you can store commonly used equations.Features:- VGA Output (available with the advanced features package. iPhone 4, 4th gen iPod, and iPad only)- 2D - 3D equation plotting.- Library for commonly used equations.- Wireframe and solid visualization.- Support for cartesian, polar, cylindrical and spherical coordinate systems.- Pinch to zoom.- Drag to rotate - move.- Swipe to delete equations from the equation list.- Shake to reset view to original state, or to clear entry fields.- Double tap to change visualization modes.- Enhanced 2D mode for great hi-res graphics.- Adaptive 2D algorithms.- Enhanced 3D mode with better graphics.- In-app email so you can share graphics and equations.- Save to photo library.- Copy to clipboard.- Enhanced equation visualization.- Hyperbolic and Inverse functions.- New functions such as Min, Max, if.- Interactive expression evaluation.- Optionally you can unlock implicit graphs, inequalities and other advanced features (via in-app purchase).- Turn graphs on/offThe optional advanced feature set includes:- VGA Out- 2D tracing.- 2D and 3D implicit graphs.- 2D and 3D inequalities.- Independent 2D zoom- Roots and Intersections (2D)- Value Table- More features to come!'This is a free appDataAnalysis App for iPad
http://www.merlot.org/merlot/viewMaterial.htm?id=910940
'DataAnalysis is a general purpose iPad App for the plotting and fitting of all types of data that can be formulated as x,y pairs. The program can be used easily by both students and professionals. It is particularly useful for quick analyses of various types of data by curve fitting, value prediction via a standard curve, and analysis of kinetic data including enzyme kinetics.Data can be entered directly via the keyboard or imported from the Mail App as a text file (.txt), and comma separated value file (.csv). In addition, data can be imported via drag and drop within iTunes. Data files in txt, csv and native formats can be imported directly from Dropbox.After data entry the user has the option to average, baseline correct, and/or normalize the data before plotting and fitting.Plotting of the data is as simple as pressing the Plot button. The axes are autoscaled and the graph is immediately ready to add to a document or presentation. The user has a variety of options to customize the graph by altering the axes, axes labels, graph title, and changing the symbol, its size and color.The data can be fit to a variety of mathematical equations by non-linear regression including simple functions such as linear, 2nd and 3th order polynomials, power, exponential, log functions. Data can also be fit to more complex equations for such processes as radioactive decay, enzyme kinetics, 1st and 2nd order chemical reactions, as well as gaussian, logistics and surge functions. The fit can be overlaid on the data with different line widths, types and thicknesses.For many analytical situations, the data fit can be used as a standard curve to determine the value of unknowns. This analytical procedure is completely automated within DataAnalysis.The program output, graphics and text, can be copied, emailed, or uploaded to Dropbox in a variety of formats including PDF, PNG and TXT. The graphics in PDF format can be edited with programs like Adobe Illustrator™ as objects.DataAnalysis also supports multitasking and printing of input data as well as all forms of output.DataAnalysis has built in tool tips, comprehensive web based instructions and how-to videos available via the Help Menu.'This is a free appQuick Graph App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=908115
'Quick Graph is the best graphic calculator available on the AppStore! It is a powerful, high quality, graphic calculator that takes full advantage of the multitouch display and the powerful graphic capabilities of the iPad and iPhone, both in 2D and 3D. A simple, yet intuitive interface that makes it easy to enter and/or edit equations and visualize them in mathematical notation. It's capable of displaying explicit and implicit (opt) equations as well as inequalities (opt) in both 2D and 3D, in all standard coordinate systems: cartesian, polar, spherical and cylindrical, all with amazing speed and beautiful results, which can be copied, emailed or saved to the photo library.''Please keep in mind that in this version, you now have to specify y=, x=, z= and so on, whenever you want to plot an equation.The advanced feature set gives you access to some of the new features, such as implicit graphs and tracing. You need to specify the dependent variable now, since just typing "x^2" without the y=, will assume the expression to be "x^2=0" and will try to plot it as an implicit graph.Up to 6 equations can be visualized simultaneously, in both 2D and 3D modes, this limitation can be removed by purchasing the advanced feature set. All the features from the original application are present and will remain free.It also includes an evaluate feature, to evaluate equations at specific points, as well as a library where you can store commonly used equations.Features:- VGA Output (available with the advanced features package. iPhone 4, 4th gen iPod, and iPad only)- 2D - 3D equation plotting.- Library for commonly used equations.- Wireframe and solid visualization.- Support for cartesian, polar, cylindrical and spherical coordinate systems.- Pinch to zoom.- Drag to rotate - move.- Swipe to delete equations from the equation list.- Shake to reset view to original state, or to clear entry fields.- Double tap to change visualization modes.- Enhanced 2D mode for great hi-res graphics.- Adaptive 2D algorithms.- Enhanced 3D mode with better graphics.- In-app email so you can share graphics and equations.- Save to photo library.- Copy to clipboard.- Enhanced equation visualization.- Hyperbolic and Inverse functions.- New functions such as Min, Max, if.- Interactive expression evaluation.- Optionally you can unlock implicit graphs, inequalities and other advanced features (via in-app purchase).- Turn graphs on/off'This is a free appPi Cubed App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=908118
'Pi Cubed is a visual math application designed from the ground up for a touch-based interface. Unlike traditional calculators, Pi Cubed lets you construct, typeset, and instantly evaluate mathematical expressions using an interactive menu system. The use of the entire screen, combined with the capability to lay out equations as they would be written on a piece of paper, makes even complex calculations easy to follow. Common touch gestures, like pinch-zooming and touch-based panning, enhance the entry and editing process.A diverse range of mathematical operations are supported, including logarithms, trigonometric functions, arbitrary roots, exponents, and factorials.Calculations can be stored within the internal database for later reference or editing. Also present within this database are over 150 built-in equations, representing fields that range from finances to fluid mechanics. You can use these equations (with fully annotated variables) for a quick reminder, or you can enter numerical values and directly evaluate the equations.Equations can be sent via email in LaTeX format for inclusion in papers or other publications.Detailed information on all features is present within the in-application manual. Video walkthroughs and the full content of this manual can be found at our product web page.'This app costs $9.99iFormulas App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=908125
'IFormulas provides an clean slate to effortlessly look up mathematical formulas.Categories :Algebra, Calculus, Chemistry, Geometry, Electrical, Trigonometry, PhysicsFeatures:Hundreds of formulasSaves Tab Bar RearrangementsFavorite FormulasScrollable and Zoomable Formula View'This is a free appApollonius App for iOS
http://www.merlot.org/merlot/viewMaterial.htm?id=908138
'Apollonius is the first (and so far the only) Interactive Geometry Software (IGS) for the iPhone and iPod Touch. It allows you to make geometric constructions (such as those made using a compass and straightedge/ruler) and move their parts smoothly using the device's touchscreen.Apollonius was inspired by similar software for personal computers, such as Cabri and The Geometer's Sketchpad.An example of a simple construction that can be made with Apollonius is a triangle with its medians, heights, and angle bisectors. Moving the vertices of the triangle will then simultaneously move the medians, heights and angle bisectors accordingly.Apollonius remembers your last construction when the program is closed. It also allows you to ZOOM and SCROLL your construction, providing a very large virtual screen.New versions will start appearing soon with great new features, so make sure to visit this page once in a while. Updating to a new version is FREE once you have bought the app!About IGSs: Interactive geometry environments are powerful tools in the development of problems and conjectures in planar geometry. They have also proven to be very useful as educational tools.'This is a free appAlgebra Review
http://www.merlot.org/merlot/viewMaterial.htm?id=906078
'The following mathlets are designed for the students in my geometry classes to review basic algebra skills in such a way that they can check their answers and/or get hints as to how to proceed.The idea behind these "procedure-based" dynamic worksheets is to provide students the opportunity to review and practice algebra skills with problems they create, while at the same time providing a means for students to check their answers and to get a hint if needed. The hints will walk the student through the problem in a step by step manner.'