eMathLab - Math Help - Math Skills

Subject Areas

Tools / Misc

bCalc

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scrnGC2: Calc Input

scrnGC3: f(x) Plot Input

scrnGC4: g(x) Plot Input

The inputs above will be hidden when the program finally gets launched. Currently, I am not hiding them even when you close the calculator. The purpose of the inputs is to help in debugging. This allows you to enter simple code on the calculator screen but the program translates the input to javascript math. Give it a try and see if you notice any obvious problems or have suggestions for improvements.

gCalc

drag-N-drop

Select precision* of answer:

Select angle mode:

Enter expression to evaluate here:

The answer is shown below:

Enter function to be plotted:

f(x) =

Enter 2nd function, if needed:

g(x) =

Change or reset the x-y scaling below:

x_min =

x_max =

y_min =

y_max =

Accuracy Disclaimer

The javascript math object methods used for this calculator are not accurate for very large or very small numbers. In particular, the trigonometric functions may yield very small answers that should actually be zero or very large answers that should be infinite. This typically occurs at 90° or pi/2 intervals.

DO NOT USE WHERE HIGH PRECISION IS REQUIRED. USE AT YOUR OWN RISK.

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Welcome to eMathLab.com

Welcome. This site is intended to give you an opportunity to practice randomly generated math problems online with instant feedback. Click on the appropriate folder, at the left, to see what is currently available in your subject area.

You may find the following information helpful as you navigate the site:

No popup worksheets. All work stays in this window.
No alerts, feedback is provided directly on the screen, usually in red.
Enter will tab you to the next unanswered question.
Check individually or answer all the questions, hit enter to check all your work.
If you have trouble matching the computed answers, feel free to click the "Give Up" flag.
Floating calculators that stay on top and can be dragged and dropped on the page.
Note the special viewer requirement for calculus.

Hopefully, you will come back often as more material is added.