calculator

5.1 Entering numbers in scientific notation to your calculator

The numbers expressed in scientific notation can be entered directly into calculators directly calculator by by pressing the key located on the lower row of keys. For instance, the key you can enter numbers using keys .

13. Activity Calculating with the scientificnotation

Utilize the functions for scientific notation in your calculator to determine each of the following and then provide your answer in both standard and scientific formats.

Find the answer

6 Powers and Surds on the calculator. calculator

Input fractional and negative power

The key was introduced in Activity 4 you saw how you can utilize key key for input power values in the calculator. The key can be combined in conjunction with other functions, such for the template of fractions to calculate negative and fractional powers.

14. Activity Calculating more power

Determine each of the following using your calculator and then give your answer right to 3 significant numbers.

Find the answer

6.1 Utilizing the roots of the calculator

As there are keypads on the calculator to enter powers as well, roots can enter directly. The square root can also be determined by using keys. For example, the keys. For instance, can be entered by using . Cube roots can be entered using the secondary function of this key. For more complex roots, like fourth or fifth roots, you must make use of the more general template that is the second purpose that is the second function of this keys. The templates is completed by using the arrow and number key ( and ) in a manner similar to the way used when the fraction template is filled in.

15. Activity Calculating roots

Determine each of the following using your calculator and then give your answer right to 3 significant numbers.

Find the answer

It is evident from the results of Activity 15 Part 4, that the calculator often provides answers with surds.

This is only true when the calculator is set to the suggested Math mode.

To determine the decimal equivalent of an answer such as this, you can utilize orkeys. These are the same or keys that you have used previously to determine the decimal equivalents for fractional solutions.

6.2 Inserting a root that is missing

Sometimes , when you enter into your calculator an equation that involves roots, you might not press the correct function key. But, moving the cursor to the right place and pressing the wrong key like in section 1 is not going to work since it simply inserts the template in an unfilled position.

If you want to modify an expression in order to insert an incorrect root, first shift the cursor to the right position - that is, just to the left side of the number. After that, activate the "Insert" feature using the key (INS) then press the root key that is appropriate.

7 trigonometric ratios you can find on your calculator

There are a variety of angles that can be measured, with degrees being just one of them. Before you use your calculator to determine the value of trigonometric ratios for angles in degrees, it is important to make sure that you have set it to use the right units.

Make sure that your calculator is using the correct method of angle measurement prior to using trigonometric ratios.

The calculator will use the degree when the indicator for display is displayed on the upper right hand corner of your screen. If you notice an indicator as well the indicator, then the calculator has been set up to utilize different measurements when measuring angles.Figure 9 shows the degrees setting

To make the calculator for working in decimal degrees, you must use your keystroke (SETUP) (Deg).

To determine the sine cosine, tangent or sine of an angle, use key , or key and then enter the dimensions of your angle. Be aware that , and keys will automatically open the bracket for you to open a bracket for. If you're just calculating the sine, cosine , or the tangent of an angle, simply click after to enter the angle, there is not a need for closing the bracket. If you're using these ratios in an overall calculation, you'll need to close the bracket by yourself (by press ) before you enter the rest of the calculation.

Certain older models of calculator require that the angle be entered first, then and then the , or button.

Activities 16: Trigonometric Ratios using your calculator

Determine the value of each of the following with your calculator and then provide your answers in order to three significant figures.

Find the answer

It is evident from the response to part (3) it is that the calculator shows the ratios of certain angles as fractions with surds when needed, but not in decimal form.

The decimal form is available by using the .

8 Identifying angles using trigonometric ratios

Inverse trigonometric numbers are found by using the second function , and of the keys, and. These functions can be used in the same way as , and .

Activity 17 Identifying angles from trigonometric ratios

Find the value for each of the following equations using your calculator If you are able and then give your answers up to one decimal.

Find the answer

In the first part (1) in the exercise above, you utilized your calculator to determine an angle with a sine of 0.5. It isn't the only angle with a sine of 0.5 however, you could make use of this angle to determine the other angles. Similar observations apply to parts (2) (3) and (3).

9 Radians in your calculator

Your calculator can be programmed to calculate trigonometric function using the radian measure of angles instead of degrees, by making use of the sequence key (SETUP) (Rad).

In this mode, the indicator for display is displayed.

Activity 18 Radians in your calculator

In this exercise the angles are measured in the radians. Determine the value of the following equations and then provide your answers to three significant figures.

Find the answer

Take note of the last instance in this exercise that when an answer is an easy (possibly fractional) multiple of the answer, it is presented in terms of instead of an decimal number.

Ten Logarithms in your calculator

Logarithms that are based on base 10 numbers are found by with the help of key key. For instance, it can be calculated by using keysequences . Be aware that, as with trigonometric functions and functions, the key will automatically open a bracket that needs to be closed when using the logarithm calculated as part of a larger calculation.

The second purpose of the key , which can be accessed by using it, is that it can be used to substitute for computing powers of 10.

19. Activity Calculating logarithms

Make use of your calculator to determine the value for the next.

, , (1 billion) ,