SCIENTIFIC CALCULATOR

5.1 Inputting numbers in scientific notation to your calculator

Numbers expressed in scientific notation can be input directly to calculators directly calculatorby making use of the key on the bottom row of keys. For instance, the key could be entered by using keys .

13, Activity Calculating with Scientific notation

Use the scientific notation features on your calculator to determine each of the following and then provide your answer in both normal and scientific formats.

Answer the question

6 Powers and surds to the calculator. calculator

Inputing fractional and negative powers

The key was introduced in Activity 4 you saw how you can utilize keys to input power. key in order to enter the power on the calculator. The key is able to be used in conjunction with other functions, such using the fraction template for calculating fractional and negative powers.

14, Activity Calculating more power

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

Find the answer

6.1 Use the roots calculator on the calculator

Like the keyboards in your calculator to enter the power and roots, they can also easily be inputted directly. You can calculate the square root by using key number key. For example, can be entered using . Cube roots are entered with the secondary function of this key. For deeper roots, like fifth or fourth roots you need to make use of the more general template which is the other function that is the second function of this key. The design is filled by using the number and arrow keys ( and ) in a similar way to how it is used when the fraction template has been completed.

Activities 15 Calculating roots

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

Reveal answer

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

This only applies this is true if the calculator is operating in the recommended Math mode.

To determine the decimal equivalent of an answer such as this, use orkeys. These are the same or keys which you previously used to discover the decimal forms of fractional answers.

6.2 Inserting a root with a defect

Sometimes , when entering into your calculator the formula that requires roots, it is possible to overlook pressing the correct function key. But, moving the cursor over the correct spot and pressing the missing key, as in section 1 above, won't work as this will just insert blank template.

If you'd like to alter an expression to add an incorrect root, first move the cursor into the correct place - that is, just to the left side of the number. After that, activate the "Insert" button by pressing (INS), and finally press the appropriate root key.

7 trigonometric ratios you can find on your calculator

There are various different types of units that an angle can be measured. Degrees being one of the possibilities. Before you use your calculator to find the values of trigonometric ratios for angles measured in degrees, it is important to make sure that you have set it to use the appropriate units.

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

The calculator can be set to utilize degrees when the display indicator is at the top of the screen. If you see the indicator as well , then your calculator has been set up to utilize different measurements for measuring angles.Figure 9 shows the degree setting

To adjust the calculator into working with degrees, use your keystroke (SETUP) (Deg).

To determine the sine cosine or the tangent of an angle, use to use the , or key and then type in the size of your angle. Note that the , and keys automatically create a bracket automatically for you. If you're merely calculating the cosine, sine or tangents of an angle just hit the keys after to enter the angle, there is not a need for closing the bracket. If you're using these ratios as part the larger calculation, you'll have to remember to close the bracket by yourself (by press ) prior to entering the other part of the calculation.

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

Worksheet 16 Trigonometric proportions calculator

Find the value for each of these using your calculator, giving your answers correct to 3 significant figures.

Find the answer

If you look at the explanation to section (3) that the calculator shows the ratios of certain angles in fractions, that include surds as needed instead of in decimal form.

The decimal form can be found by using as well .

8 Identifying angles from trigonometric ratios

The inverse trigonometric coefficients are found with the second and third functions, as well as of the, and keys. These functions function in a similar way to , and .

Activity 17 Identifying angles from trigonometric ratios

Find the value for the following expressions using your calculator whenever possible making sure that your answers are correct to 1 decimal place.

Reveal answer

In the first part (1) in this task above, you used your calculator to determine an angle with a sine of 0.5. It's not the sole angle with a sine of 0.5 and you can apply this angle to discover other angles. Similar observations apply to parts (2) and (3).

9 Radians on your calculator

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

In this mode, the display indicator is shown.

Activity 18 Radians in your calculator

In this assignment, the angles are measured in radians. Find the values of the following equations in the correct order, and provide your answers to three significant figures.

Reveal answer

Take note of the last example in this activity that where the answer is a simple (possibly fractional) multiple of the answer is presented in terms instead of a decimal number.

10-Logarithms using your calculator

Logarithms that are based on base 10 numbers can be found using key key. For example, can be calculated using this key sequence . Note that as with the trigonometric functions, the key will automatically open a bracket, which needs to be closed when using the calculated logarithm as a part of a larger calculation.

The second use of the key that can be accessed through the keyboard, can be utilized to substitute for making calculations with powers of 10.

Activities 19 Calculating logarithms

Use your calculator to calculate the numbers that follow.

, , (1 billion) ,