The following are calculations that use degrees. Measurement of angles using radians called the "radian system of angular measurement". Note that ClassPad does not have a Grad angle mode. The following are calculations that use grads. What do I need to do to produce the graph of a sine wave? The calculator shows the results as a fraction. How can I change it to display a decimal answer? For example, change the calculator from radian mode to degree mode?
How do I get those back on my calculator? When the fx-CG Series is connected to a computer will it display like my calculator? The table I created only produces five coordinate pairs; how do I set it to show more? When I select an equation in Conic Graphs, I noticed the modify option; what does that do? Programmable calculators are fxP and fxP II. When I perform a calculation on my ClassWiz Series calculator, why does the result appear as a fraction?
With this setting, fraction format is given priority for calculation results. ClassWiz lets you change the setting to specify decimal value format for results. Does ClassWiz support sexagesimal degrees, minutes, seconds and time hours, minutes, seconds calculation?
The [MODE] key can be used to select the modes described below. COMP: Basic arithmetic calculations arithmetic operations, trigonometric functions, etc. Note that changing the Fix and Sci settings does not affect internal calculation results. Norm: Exponential display format and cancels the currently configured Fix and Sci settings. Fix: Specifies a fixed number of digits to the right of the decimal place. Sci: Specifies a fixed number of significant digits.
Is it possible to accomplish calculations of complex numbers specially in polar form with scientific calculators? When an answer is given in fraction form, how do I change that fraction into a mixed number? FAQs How can we help? Mathematics Why do I keep getting an error message when I try to perform arithmetic or trigonometric calculations?
You need to change the x-min, x-max, y-min, y-max, and other settings on the calculator's View Window to match the output range you want. The following are operations you can perform on your calculator to initialize View Window settings so they are compatible with the currently selected angle mode. It changes the fraction to decimal number. Using this button you can change between the decimal number form and fraction form. Also, using the division button, instead of our fraction button, will display answers as a decimal.
Can I connect my graphing scientific calculator to a projector? Logarithm of a number to an arbitrary base Logarithms in base 10 common logarithm and e natural logarithm can be calculated directly using the keyboard. Note: With a graphic calculator such logarithms can also be drawn. Figure : Selecting the approximate mode. Pressing or pressing the down arrow key then pressing to choose NO means the HP 50g stays in Exact mode and can not calculate a non-integer answer, so it will give an error message.
To clear an error message, if one is displayed, press the key to cancel the error, then press the key to delete the message from the stack. Press the key and then press the key below the menu label. If the label is checked, as in Figure 3 , Approximate mode is set, so press the key below the menu label to uncheck it.
Then press the key below the menu label to accept the change to Exact mode. Figure : Selecting the exact mode. The main Calculator Modes form will now be displayed. If the second line does not say STD then press the down arrow key once, press below the menu label, use the up or down arrow to select STANDARD mode, and press the key below the menu label to accept the change to Standard mode.
The Menu Form should now look as in Figure 4. Figure : Selecting the standard mode. It is also worth checking the status of two system flags so that fractions are displayed as they should be. Press the key below the menu label to change the flags. Press twice to reach flag 52, the second system flag whose number begins with a 5.
If flag 52 has a check mark by it, press the key below the menu label to uncheck it, so the menu looks as in Figure 5. Figure : Checking the status of the system flags. Now use the down key to reach flag 79, or press the key eight times. These two settings make the HP 50g show fractions on two lines Press the key below the menu label to accept the flag settings.
Press one more time to accept all the changes and quit the Calculator Modes form. Now the calculator is in Exact mode and Standard mode. If the examples above did not give the expected answers, it is worth trying them again. Figure : Displaying the exact mode. Press the key and then press below the menu label, use the up or down arrow key to select RPN mode, then press the key below the menu label to accept the change to RPN mode, and press the key again to leave the Calculator Modes Form.
It displays the fraction as in Algebraic mode. Then type to complete the same calculation as in Algebraic mode. The HP 50g will show:. Figure : Calculating the fractions in the RPN mode. RPN works in step-by-step mode, so it does not automatically simplify the result, as Algebraic mode did. Then press the key below the menu label. This simplifies the expression, giving the same result as in Algebraic mode. Here is another calculation to be tried in RPN mode. Multiplying the two by pressing again gives a combination of two fractions with no simplification.
Press the key below to see the expression in the equation editor. Figure : Calculating the fractions using the equation editor. Press below the menu label to evaluate the expression. Then press to enter the evaluated value on the stack. To type the original example again, but as fractions in RPN, press. Your calculator is set to use degrees if the display indicator is shown at the top of the screen. If you see the indicator or , then your calculator is set to use different units for measuring angles.
To calculate the sine, cosine or tangent of an angle, press the , or key and then type in the size of the angle. Note that the , and keys automatically open a bracket for you. If you are simply calculating the sine, cosine or tangent of an angle, just press after entering the angle — there is no need to close the bracket. If you are using these ratios as part of a larger calculation, then you will need to remember to close the bracket yourself by pressing before entering the remainder of the calculation.
Some older models of calculator require the angle to be input first, followed by the , or button. Calculate the value of each of the following using your calculator, giving your answers correct to 3 significant figures. If you obtained the answer 0. Note that when entering this expression in your calculator, it is possible to omit explicitly entering the multiplication between the 2 and since the calculator will assume it.
Note that means first find the sine of , then square the answer. The key sequence to enter into the calculator is thus. The first is necessary to close the bracket automatically opened when pressing , and the second closes the bracket opened at the start of the sequence.
Since the calculator evaluates the sine as soon as it encounters the first closing bracket, it is possible to enter this expression using the alternative sequence , but this is not recommended as the former is more clear. It is a property of trigonometric ratios that for any angle ,.
You will notice from the answer to part 3 that the calculator displays the ratios of some angles as fractions, involving surds where needed, and not in decimal form.
The decimal form can be found using or. Inverse trigonometric values can be found using the second functions , and of the , and keys. These functions are used in a similar manner to , and. Calculate the value of each of the following expressions using your calculator, where possible, giving your answers correct to 1 decimal place. If you obtained the answer or 0. Make sure that you are working in degrees.
In part 1 of the activity above, you used your calculator to find an angle whose sine is 0. This is not the only angle whose sine is 0.
Similar remarks apply to parts 2 and 3. Your calculator can be set to calculate trigonometric functions using the radian measure for angles, instead of degrees, by using the key sequence SETUP Rad. When in this mode, the display indicator is shown. In this activity, the angles are measured in radians. Find the values of the following expressions, giving your answers correct to 3 significant figures. Remember: can be input to the calculator using. Notice from the final example in this activity that where an answer is a simple possibly fractional multiple of , the answer is displayed in terms of rather than as a decimal number.
Logarithms to base 10 of numbers can be found using the key. For example, can be calculated using the key sequence. Note that as with the trigonometric functions, the key automatically opens a bracket that must be closed if you are using the calculated logarithm as part of a longer calculation.
The second function of the key , accessed using , can be used as an alternative to when calculating powers of All the calculations are logarithms to base 10, so we use the key.
Natural logarithms, for example , can be evaluated on your calculator using the key. The second function of this key permits the calculation of powers of. Note that an approximate value for itself can be obtained using the key sequence. Remember that means the same as ln. Some calculators have a key instead of. Calculate the value of each of the following using your calculator, giving each answer to 3 significant figures.
Notice that this is about three times the answer to part 2. In fact, the exact value of is precisely three times the exact value of. This is because , and for any base of logarithm,. This is an important result for logarithms. In this case we have. To calculate this answer correctly, you need to remember to close the bracket after the 3 on your calculator display. Comp mode is selected by using the key sequence COMP. There are two different ways in which mathematics can be input to and displayed on the calculator:.
You know that you are in Math mode if the word Math is shown near the right-hand side of the top of the calculator display. If this is not shown, you are using Linear mode. In Math mode, you can force an answer to be displayed as a decimal using , or you can toggle between the mathematical and decimal outputs using.
It is possible to set the calculator so that answers that are top-heavy fractions such as are always displayed as mixed numbers such as. The key has been pressed. The line displayed is longer than can fit on the display. CLR Memory Yes. CLR All Yes. STO M. Set answers to be displayed to 3 decimal places To use a different number of decimal places, replace with that number. Set answers to be displayed in scientific notation with 3 significant figures To use a different number of significant figures, replace with that number.
In Math mode:. In Linear mode:. When using trigonometric functions, ensure that your calculator is set to use the correct units: degrees or radians. This free course provided an introduction to studying Mathematics and Statistics. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.
Course image: kaboompics. If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University - www. Printable page generated Friday, 12 Nov , Use 'Print preview' to check the number of pages and printer settings.
Print functionality varies between browsers. Printable page generated Friday, 12 Nov , Using a scientific calculator Introduction The course describes some of the main features of a scientific calculator and encourages you to use your calculator, both for everyday arithmetic and for more complicated calculations that use the function keys as well.
Learning outcomes After studying this course, you should be able to: understand the basic functions on your calculator understand which calculator functions are needed for a given problem understand what may go wrong when entering calculations and know how to fix them apply knowledge of calculator functions to a range of mathematical calculations.
Figure 1 A typical scientific calculator. Figure 2 The calculator display. Figure 3 A typical calculator on-screen menu. Activity 2 Sums, differences, products and quotients Use your calculator to work out the answers to the following calculations.
Activity 3 Fractions and decimals Use your calculator to find in both fractional and decimal forms. Answer In Math mode, calculating gives the result. Figure 5 The general power key function. Activity 4 Calculating powers Calculate each of the following using your calculator. Answer Here you need to use the general power key. The Syntax Error screen gives you two options: Press to abandon the calculation and clear the screen press either or to return to the erroneous calculation with the editing cursor placed at the point of the error, ready for a correction to be made Figure 6 Syntax Error.
Section 4 considers how you might do this. Activity 5 Making corrections Enter the following key sequence into your calculator in an erroneous attempt to calculate : What should the correct answer be, and why does this key sequence not give it?
Use the calculator editing functions to correct the inputted key sequence. Answer The correct value of is Figure 7 The cursor, placed after the 3. Corresponding to these there are two different minus sign keys on the calculator: , which is used for the operation of subtraction, as in , which is used for negative numbers, e.
Activity 6 Subtraction and negative numbers Calculate each of the following using your calculator. Answer Remember to press to obtain a decimal answer. Figure 8 A fraction template. Activity 7 Fractions Use your calculator to: express in its simplest form calculate of Answer of can be written , which is equal to or Activity 8 Mixed numbers Use your calculator to: express as a mixed number in its simplest form express as a top-heavy fraction.
Answer Remember to use to toggle between the top-heavy fraction and mixed number answers. Activity 9 Using the fraction key The most obvious way of calculating is to enter it as a fraction on your calculator. What key sequence is needed, and what is the final answer to 3 significant figures? Answer to 3 significant figures.
Activity 10 Using the key You will not obtain the correct answer to the calculation if you type into your calculator and press. Answer Typing into the calculator and pressing will not give the correct answer because the calculator will follow the BIDMAS rules and divide by 4 and then multiply by , instead of dividing by. Activity 11 Bottom first! Answer The value of the denominator is
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