Open Graphing Calculator

Here is the link to our pre-Beta release of the Open Graphing Calculator. The current alpha version is 0.35 and I plan on updating it every Sunday...we are fixing issues as they  arise. So hit [ refresh ] often.

http://www.opengraphingcalculator.com/

Be sure to play around with the calculus toggle buttons. Report any issues on gitHub.

The Graphs of the Six Trigonometric Functions

The objective here is to have the basic graphs of all six trigonometric functions ready to go. Here is a link to a one-page printable reference sheet.

1. One period graphed for the sine function. ( y = sin x )

2. One period graphed for the cosine function. ( y = cos x )

Notice that cosine function is a horizontal translation of sine by π/2 units. To see this click on the link below for an interactive graph.

Desmos Interactive Graph

3. One period graphed for the cosecant function. ( y = csc x = 1 / sin x )

4. One period graphed for the secant function. ( y = sec x = 1 / cos x )

Notice that the zeros of sine and cosine define vertical asymptotes for the cosecant and secant functions. To see this click on the link below for an interactive graph.

Desmos Interactive Graph

5. One period graphed for the tangent function.  ( y = tan x = sin x / cos x )

6. One period graphed for the cotangent function. ( y = cot x = cos x / sin x )

Notice that for the tangent function, the zeros of cosine determine the vertical asymptotes. And for the cotangent function, the zeros of sine determine the vertical asymptotes.

Desmos Interactive Graph

Enjoy.

Intermediate Algebra Sample Test Questions

I have added two worksheets that are to accompany the free to read online Intermediate Algebra textbook.

[ Algebra Fundamentals - Chapter 1 ]

[ Graphing Functions and Inequalities - Chapter 2 ]

Remember that you can find a complete list of visually searchable videos that accompany these chapters by clicking the link below.

Intermediate Algebra -- Visually searchable YouTube playlist. 

Instructors: You can find more worksheets by clicking the Intermediate Algebra Textbook link on this site. Please feel free to cut-and-paste anything you find here into your course.

Algebra: Graphing Lines (Study Guide)

Chapter 3: Graphing Lines

Extra video examples to accompany Elementary Algebra - the free to read online open textbook published by Flat World Knowledge.

--> Click on a problem below to see it worked out on YouTube. <--

Rectangular Coordinate System
Graph by Plotting Points

Graph Using Intercepts

Graph Using the y-Intercept and Slope

Finding Linear Equations

Parallel and Perpendicular Lines

Introduction to Functions

Linear Inequalities (Two Variables)

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