Let’s take a look at the intersect feature. Intersect finds the intersection between two curves, which can be a very handy feature.įinally, dy/dx calculates the derivative of the currently selected function at a point, and the ∫f(x)dx calculates the area between a curve and the x axis over an interval. Minimum finds the minimum value of a function within a range, and Maximum likewise finds the max value on an interval. Zero lets you find zeroes of the function within an interval you specify. You can select the current function by pressing ▲ and ▼ while in TRACE mode. Value tells you the value of the currently selected function at a specific point. This menu provides a variety of handy tools for doing calculations from your graphs. You’ll notice that when we go back to the graph, the grid is now displayed.įinally, let’s take a look at the Calc menu, which can be reached by pressing 2nd TRACE. Let’s set this to “On”.ĪxesOn and AxesOff toggle the coordinate axes and LabelOff and LabelOn give you the option to display labels on these axes or not.įinally, ExprOn and ExprOff set whether or not you want the equation to be displayed on top of the graph when you’re using the TRACE function. This function can add a lot of clutter, but might also help you make more sense of your picture. GridOff and GridOn set whether or not you want a basic grid overlay displayed on your graph. RectGC and Polar GC let us choose how coordinates are displayed when using the TRACE function.ĬoordOn and CoordOff toggle whether or not coordinates are displayed when using the TRACE function. This is reached by pressing 2nd ZOOM (you’ll see FORMAT written above the key) and lets us control a variety of aspects of how the graph is formatted. Now let’s take a quick look at the Format menu. Note that on older calculators such as the TI-83 Plus, this zoom level may not be available, it’s one of the few features added in the TI-84 Plus is that of some simple symbolic fraction capabilities. This gives us a nice way to use the trace function with the graph of x 2. Let’s go back again and choose ZFrac1/10 (Zoom Fraction 1/10). In other words, the window is just a numerical interface for this. We could input values here for the various boundaries in the window, but it’s usually easier to remember that you can also set these parameters on the Zoom menu. The Window menu shows us the current zoom settings, and you’ll notice that Xscl (xscale) is pi/2, which determines how far apart our tick marks are on the x axis. Go over another 6, and we have the value at pi/2. 785, which is pi/4, so each left or right tick is pi/24 in this mode. You’ll notice that the points the Trace function chooses might not appear nice, but press ▶ six times and we see that it displays the value at. First though, let’s press ▼ to switch from x 2 to the sine wave, which is indicated in the upper left corner. We reach this by pressing the TRACE button, and it allows us by pressing ◀ and ▶ to see the exact values of the function on our graph. We can see exactly two periods in our sine wave and the tick marks that correspond to integral portions of the graph. The ZoomTrig function, reached by pressing 7 on the Zoom menu gives us a really nice picture. We want to get a closer look at our sine wave, so let’s go back and try out a different zoom function, ZoomTrig. The ZoomFit feature can work very well sometimes, but it can’t always read your mind. The equations are re-graphed, and while the graph of y = x 2 looks nice, it’s difficult to see the graph of the sine wave. We can reach this by scrolling down on the Zoom menu and selecting ZoomFit (Option 0).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |