Angles Calculator vs plotXpose

Do you need to learn how to determine the angles and lengths of a Right Angle Triangle? Need to clearly understand which of the sine, cosine and tangent ratios to use? Need to know how to determine the angle when you know two of the sides. If the answer is Yes to any of these questions then this App is for you. The Angles Calculator not only calculates the answers for you but it also tells you how it did it so you can understand how and when to apply the rules for right angle triangles. New this version: Now the area of the triangle is calculated for you. An explanation of how this was done is also given. The App is simple to use. Just enter an angle and a side or two sides and all the others will be calculated for you. To see how the answers were arrived at just select the 'Workings' button and a page is shown with a comprehensive set of steps to show how each was calculated. To enter a value for an angle or a side just touch the diagram on or near the one you want to specify. The keypad pops up. Enter the value you want and select OK. Select the other value and do the same. When you press OK this time the App calculates the other values. To start over select 'Clear All'. All values are reset. You can now specify two other values. Note: The App cannot calculate the answers if you specify two angles and no sides. It is mathematically impossible. You have to specify an angle and a side or two sides.

Plot functions, derivatives & integrals. Explore frequency analysis and Digital Signal Processing (DSP) concepts through graphs. Solve equations numerically using a variety of methods. plotXpose app is a companion to the book Mathematics for Electrical Engineering and Computing by Mary Attenborough, published by Newnes, 2003. The app allows you to define and plot a General Function made up by a composition of any of the following standard operations and functions: -, +, *, / , ^(power), sin, cos, tan, ln (log base e), log (log base 10), arcsin (inverse sine), arccos (inverse cos), arctan (inverse tangent). In addition a Square Wave or Triangular Wave can be defined. You can Open a previously saved function from a file. The function is defined as a function of t (often representing time). Initially the function is defined for values of t between t = -5 and t = 5, at a sampling interval of 0.01, and the y-axis is displayed over the full range for y. These values can be changed using Settings. The function is displayed and also the exact Derivative. The Integral can also be viewed on the same axes and the Frequency spectrum is viewed in a separate tab. o determine values on the graph use View to display a grid or Display Position, in which, tapping on the function, its derivative or integral, displays the coordinates at that location. You can Save to a file any one of the function, derivative or integral. These values can be read back into plotXpose via the Open menu item. Equation solving can be performed using the Zero Find option with various numerical methods. The sequence of values found is displayed on the screen and can be saved to a file. Tangent Mode can be used to display tangents to to any of the defined curves along with the gradient and the equation of the tangent. There are some problems and investigations on the companion website to accompany Mathematics for Electrical Engineering and Computing for which this app can be used. In addition many of the Exercises in other chapters (e.g. graph sketching, numerical integration, sequences) can be checked with the aid of this app. Some extra suggested Problems are given on the plotXpose help website.