SCIENTIFIC CALCULATOR

5.1 Entering numbers using scientific notation to your calculator

The numbers expressed in scientific notation are able to be entered directly into calculators directly calculatorby using the key in the lower row of keys. For instance, the key can be entered using keys .

Activity 13 Calculating with Scientific notation

Utilize the functions of scientific notation of your calculator to calculate each of the following you can answer the question in both ordinary and scientific forms.

Get the answer

6 Powers and surds on your calculator

Inputing fractional and negative powers

In Activity 4 you saw how to use key key as a way to add powers on the calculator. The key can be used together with other functions such in the form of the Fraction Template , to calculate negative and fractional powers.

Activity 14 Calculating more powers

Answer the following questions using your calculator Answer correctly to three significant figures.

Get the answer

6.1 Calculate the roots using the calculator

Just as there are keypads on the calculator to enter power as well, roots can simply be typed in. You can calculate the square root by using keys. For example, the keys. For example, can be entered using . Cube roots are entered using the second function of the key. If you want to enter higher roots, such as fourth or fifth roots, it is necessary to employ the more general template that is the second purpose that is the second function of this keys. This template can be filled out by using the arrow and number keys ( and ) in a way similar to the way used when the fraction template is finished.

15. Activity Calculating roots

Determine each of the following using your calculator Then, you must give your answer correctly to three significant figures.

Reveal answer

The outcome of Activity 15, part 4. 4 that the calculator will sometimes provide answers with surds.

This can only be done it the calculator is set to the recommended Math mode.

To find the decimal equivalent of a question like this, you can use an or keys that you used earlier to identify the decimal equivalents from fractional questions.

6.2 Inserting a root missing

Sometimes when entering into your calculator an expression that has roots, you might forget to press the appropriate function key. However, moving your cursor to the correct point and pressing the missing key, as in section 1 it won't be able to help since this simply inserts an empty template.

If you wish to edit an expression to add an unintentional root, you must first move your cursor to the right position - that is, towards the left. Then , you can activate the "Insert" feature using the key (INS) and then pressing the root key that is appropriate.

7 Trigonometric ratios that you can calculate on your calculator

There are numerous different angles that can be measured, with degrees being one of them. Before using your calculator to determine the value of trigonometric rations of angles measured in degrees you need to ensure that it is configured to use the right units.

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

It is likely that your calculator will use the degree when the display indicator is visible towards the front of the display. If you see this indicator as well it is, then your calculator has been set up to utilize different measurements when measuring angles.Figure 9 shows the degrees setting

To configure your calculator so that it works in degrees, make use of the key sequence (SETUP) (Deg).

To determine the sine cosine or the tangent of an angle, use key , or key and then enter the length of your angle. Note that the , and keys will automatically create a bracket automatically for you to open a bracket for. If you're simply trying to calculate the sine, cosine , or the tangent for an angle, just hit the keys after you have entered the angle - there's absolutely no requirement to shut the bracket. If you're using the ratios as part of a larger calculation, then it is important to remember to close the bracket on your own (by pressing ) before you enter your calculation.

A few older models of calculator have the required angle to be input first, followed by the , or button.

Exercise 16 trigonometric numbers on the calculator

Calculate the worth of each of these using your calculator and then provide your answers accurate to 3 significant figures.

The answer is revealed

You'll notice from the explanation to section (3) in that calculator will display the ratios of some angles as fractions, including surds if needed, and not in decimal format.

The decimal form can be obtained by using or .

8 Finding angles from trigonometric ratios

The inverse trigonometric coefficients are found by using the second functions , and of the, and keys. These functions function in a similar way to , and .

Activity 17 Find angles from trigonometric ratios

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

Find the answer

In part (1) in this work above, you utilized your calculator to find an angle with a sine value of 0.5. It isn't the only angle whose sine is 0.5 however, you could apply this angle to discover other angles. Similar points apply to the parts (2) as well (3).

9 Radians on your calculator

Your calculator is able to calculate trigonometric functions using the radian measure for angles, not degrees, making use of the key sequence (SETUP) (Rad).

In this mode, the display indicator is shown.

Activity 18 Radians on your calculator

In this lesson the angles are measured in the radians. Find the values of the following equations, giving your answers correct to 3 significant figures.

Answer the question

Take note of the last illustration in this activity when an answer is simply a (possibly fractional) multiple of the answer is shown in terms of rather than as a decimal number.

10 , Logarithms, on your calculator

Logarithms for base 10 numbers can be found with the help of key key. For example, can be determined using the sequence of keys . As with trigonometric functions that the key will automatically open a bracket that has to be closed if using the calculated logarithm as a part of a bigger calculation.

The second purpose of the key via the internet, could be used as an alternative for formulating powers of 10.

19. Activity Calculating logarithms

Make use of your calculator to find the values for the next.

, , (1 billion) ,