calculator

5.1 Inputing numbers in scientific notation to your calculator

Numbers written in scientific notation can be entered directly into calculators directly calculator by using the key in the row below. For example, is possible to enter keys .

Activity 13 Calculating with Scientific notation

Use the scientific notation features within your calculator to determine the number of these answers, and provide the answer in both ordinary and scientific forms.

The answer is revealed

6 Powers and surds for your calculator

Inputting fractional and negative powers

Within Activity 4 you saw how you can make use of the key to input power values on the calculator. The key can be used along with other functions, for instance, for the template of fractions , to calculate negative and fractional powers.

14, Activity Calculating more power

Find the appropriate answer for each of the questions below using your calculator and then give your answer accurate to 3 significant figures.

Get the answer

6.1 Calculate the roots using the calculator

Like the keys on your calculator to enter power, roots can also be entered directly. Square roots can be calculated using the keyboard. For example, can be entered using . Cube roots are entered with the secondary function of this key. For deeper roots, for example, fourth or fifth roots, you must utilize the more generic template that is the second function that is the second function of this keys. This model is entered by using the arrow and number keys ( and ) in a similar way to that used when the fraction template is filled in.

Activities 15 Calculating roots

Answer the following questions using your calculator, giving your answer correct to 3 significant figures.

Reveal answer

It is evident from the results of Activity 15, part 4 that the calculator occasionally provides answers using surds.

This only applies in the event that the calculator is operating in the recommended Math mode.

To find the decimal equivalent of a question like this, you could use these or keys that you used earlier to identify the decimal equivalents of fractional answers.

6.2 Inserting a root that is missing

When entering into your calculator an expression that has roots, you could miss pressing the appropriate function key. But, moving the cursor towards the correct location and pressing the wrong key similar to the one in section 1 is not going to work since it will simply create an inactive template.

If you wish to edit an expression in order to insert the missing root, first move the cursor into the correct place - that is just to the left side of the number. Then , you can activate the "Insert" function by pressing (INS), and finally press the root key that is appropriate.

7 trigonometric ratios you can find on your calculator

There are many different measurement units for angles that can be measured, degrees being one of them. Before using your calculator to determine the value of the trigonometric ratios of angles in degrees, you should ensure that it is set to use the right units.

Always verify that your calculator is using the correct system of angle measurement prior to using trigonometric ratios.

You calculator will use the degree when the display indicator appears at the top of the screen. If you notice that indicator in the upper right hand corner it is, then your calculator uses different measurement units when measuring angles.Figure 9 The degrees setting

To adjust the calculator to work in degrees use keys (SETUP) (Deg).

To calculate the sine cosine or tangent of an angle, simply press on the , or key and then type in the size that the angle. Make sure that , and keys will automatically create a bracket automatically for you. If you're only calculating the sine, cosine , or tangent of an angle, just hit the keys after to enter the angle, there is an obligation to close your bracket. If you are using the ratios as part of larger calculations, then you will need to remember that you must close the bracket (by press ) before you enter the rest of the calculation.

Certain older models calculator need the angle to be entered first, then and then the , or button.

Exercise 16 trigonometric numbers on the calculator

Determine the value of each of the following using your calculator by giving your responses right to 3 significant numbers.

Get the answer

It is evident from the response to part (3) you will notice that this calculator displays the ratios of certain angles as fractions including surds if needed, and not in decimal forms.

The decimal form can be obtained by using or .

8 Calculating angles from trigonometric ratios

The inverse trigonometric coefficients are found by using the second and third functions, as well as of the keys, and. These functions are used in a similar manner to , and .

Activity 17 Finding angles from trigonometric ratios

Calculate the value of each of the following expressions using your calculator When you can you can answer the questions correctly to 1 decimal.

The answer is revealed

In the first part (1) in the work above, you utilized your calculator to find an angle with a sine of 0.5. This is not the only angle with a sine of 0.5 however, you could utilize this angle to identify the other angles. Similar points apply to the parts (2) (2) and (3).

9 Radians on your calculator

Your calculator is able to calculate trigonometric calculations using the radian measure of angles, not degrees, using keys (SETUP) (Rad).

When in this mode, the indicator for display will be displayed.

Activity 18 Radians in your calculator

In this task the angles are measured in Radians. Find the values of the following formulas by completing your responses to 3 significant figures.

Get the answer

Notice from the final example of this activity that the answer given is an easy (possibly fractional) multiple of the answer, it will be displayed in terms rather than as an decimal number.

10 Logarithms on your calculator

Logarithms that are based on base 10 numbers are found by with the help of key key. For example, can be calculated by using this key sequence . Be aware that, as with trigonometric functions and functions, the key instantly opens a bracket that needs to be closed when using the logarithm calculated as part of a bigger calculation.

The function 2 of the key , which can be accessed through the keyboard, can be utilized in lieu of formulating powers of 10.

19. Activity Calculating logarithms

Make use of your calculator to find the numbers that follow.

, , (1 billion) ,