HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 152
The Triangle Solve Aplet, Example 1
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THE TRIANGLE SOLVE APLET This aplet allows you to solve for missing sides and angles in a triangle, either right angled or not. Unlike most aplets it does not have a SYMB, NUM and PLOT view but only the dual view discussed below. When you first start the aplet you will be presented with one of two views. The view right is for a general triangle, while the second view assumes a right triangle. Obviously the amount of information which must be supplied is less for the right triangle. 25 The choice of which view you use is controlled by the button labeled , short for "rectangular". When is selected (shown by the dot) you are supplying information for a right triangle. In both cases the procedure is to supply sufficient information to allow the triangle to be solved, hence the message to "Fill 3 out of 6 values". This request should be taken with a pinch of salt. For example, in the case of a right triangle it is actually only necessary to supply 2 values despite what is stated. 115° 7cm 15cm Example 1 Solve the triangle shown right. Use the Aplet view to select and the aplet. The second is to ensure that we are working in degree mode. Change to the MODES view and choose Degrees. Now press SYMB (or NUM or PLOT) to change back to the view shown right. 152
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