Precalculus Tools Calculator and Function Evaluator

<-' does previous calculation. '-> does following calculation.
Symbol Meaning
pi 3.141592...
e 2.718...
sin Sine function
cos Cosine function
tan Tangent function
asin arc sine function
acos arc cosine function
atan arc tangent function
exp e to the power
log Logarithm base e
exp10
10 to the power
log10
Logarithm base 10
abs Absolute value
sqrt Square Root
toDegrees Translate radians to degrees
toRadians Translate degrees to radians
Graph Paper
Click on the graph paper to add or remove points. Enter functions in blue red and yellow formula text box labeled 2m). Points are displayed in area 2d and you can add and change points in this area. You can also change the names of the independent and dependent variable by editing area 2d.

Stock Modeler

The Stock data display can be started by entering a stock symbol in the textfield (2d). If you do not know the symbol for the company you want then you can click on the list of choices (4d) and choose Look up symbol from Yahoo =

Once you have a correct symbol entered you can click on the enter stock button (1d) or just hit enter in the text field. The closing prices for the stock in 12 selected months will appear in the display (3d).

You can select other stock statistics like opening prices or volume from the list (4d). You can also get the current price of the stock and a chart of its recent behavior by selecting chart for stock from the list in (4d).

After graphing the data you can model it with a function in field (2m) and either hit enter or click on the enter function button (1m). A report on the difference between the function and the button at each point will appear in report area on the bottom and the total of the errors at each point appears in the total error field (3m).

Stock Modeler with 3 models

The Stock data display can be started by entering a stock symbol in the textfield (2d). If you do not know the symbol for the company you want then you can click on the list of choices (4d) and choose Look up symbol from Yahoo

Once you have a correct symbol entered you can click on the enter stock button (1d) or just hit enter in the text field. The closing prices for the stock in 12 selected months will appear in the display (3d).

You can select other stock statistics like opening prices or volume from the list (4d). You can also get the current price of the stock and a chart of its recent behavior by selecting chart for stock from the list in (4d).

After graphing the data you can model it with a function in field (2m) and either hit enter or click on the enter function button (1m). A report on the difference between the function and the button at each point will appear in report area on the bottom and the total of the errors at each point appears in the total error field (3m).

Function Combinations Graphs up to 5 functions simultaneously in rectangular coordinates, allowing definitions of one function in terms of others.
How to use ||Examples || Other Notes
From International Education Software From International Education Software Sine Demo http://www.ies.co.jp/math/java/trig/graphSinX/graphSinX.html Cosine Demo http://www.ies.co.jp/math/java/trig/graphCosX/graphCosX.html Circle Demo Circle Demo from Dr. Cecilia Barnbaum From Dr. Philippe B. Laval, at Kennesaw State University From Dr. Philippe B. Laval, at Kennesaw State University Rational Functions Demo http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut40_ratgraph.htm Sine Transform Demo

Role of a,b,k and c in y = a + b sin(k(x-c))

The purpose of this applet is to illustrate how the values of a, b, c and k affect the graph of the sine function. It is supposed to function as follows:

Use the scroll bar to change the values of a, b, k and c. The graph of the sine function should change as these values change. The value of each parameter to the left of the scroll bar should also be updated. The changes should happen as follows:

  • Changing a will move the graph up or down by |a| units.
  • Changing b will change the amplitude (thus the range).
  • Changing k affects the period. The period is 2 pi / k.
  • Changing c will cause the graph to be shifted left or right by |c| units.
 Cosine Transform Demo

Role of a,b,k and c in y = a + b cos(k(x-c))

The purpose of this applet is to illustrate how the values of a, b, c and k affect the graph of the cosine function. It is supposed to function as follows:

Use the scroll bar to change the values of a, b, k and c. The graph of the cosine function should change as these values change. The value of each parameter to the left of the scroll bar should also be updated. The changes should happen as follows:

  • Changing a will move the graph up or down by |a| units.
  • Changing b will change the amplitude (thus the range).
  • Changing k affects the period. The period is 2 pi / k.
  • Changing c will cause the graph to be shifted left or right by |c| units.

Copyright David B. Sher 2004