Contents

#### CALCULATING DEVICES

**Operations with the scientific CALCULATOR**

**1. Addition**

a) 375 + 601 = 976

b) 401 + 2801 + 70120 + 3 = 73, 325

c) 0.0175 + 2.561 + 3.8976 = 6.4761

**2. Subtraction**

a) 2890 – 576 =2314

b) 215 – 891 = -676

c) 7510 – 204 – 79 = 7227

**3. Division**

a) 591 ÷ 27 = 21.889

b) 79775 ÷ 4795 = 16.62671947

**4. POWERS (^)**

a) 28 = 256

b) 49 = 262,144

c) 93 = 729

d) 4292 = 184,041

**4. Multiplication**

a) 7694 x 21 = 161,574

6. Roots

i) Square roots

a)

b)

c)

ii) Cube root

a)

b)

iii) nth Root

a)

b)

Note:

Also

EXAMPLE

a) Use your calculator to find the value of

1.

2.

3.

4.

5.

6.

b) Evaluate to 3 decimal places

i)

ii)

c) Find the value of A given by the formula if P = 126, r = 4 and n = 5

Solution

d) The area of a triangle is given by where 2s = a + b + c. Find the area of a triangle given that a = 14.2, b = 12.6 and c = 8.4

Solution

a + b + c = 2s

14.2 + 12.6 + 8.4 = 2s

Power of e

i) Calculate

a) 2 = 7.389056099

b) 5 = 148.4131591

c) = 1.947734041

Logarithm function

Example

1. = 0.69897

2. = 2.321928095

Natural Logarithm x

1.

2.

Trigonometrical function

1. Sin 30 = 0.5

2. Sin 30 27’ = 0.506786256

3. Cos-1 = 60

QUESTION

1. correct to 6 decimal places

2. correct to 3 decimal places

3. correct to 4 decimal places

4. correct to 6 decimal places

5. correct to 4 decimal place

6. correct to six decimal places

7.

8. correct to five decimal places

9. correct to six decimal places

10. correct to six decimal place

11. correct to six decimal places

12. correct to five decimal places

ANSWERS

1. 1.667812

2. 351.886

3. 1.6283

4. 3.033894

5. 1.4868

6. 0.245465

7.

8. 0.37881

9. 1.226122

10. 2.995246

11. 1.3

12. 0.0

CONVERSION OF ANGLES FROM DEGREES TO RADIANS AND THE OPPOSITE

EXAMPLE

1. Convert 180° to radian

= 3.141592654 rad

2. Convert 1.57 rad to degrees

= 89.95437384

Statistical functions

Question

1. Find x ,, x n –

1. Using your calculator for the following number 16, 22, 10

Solution: = 48

= 16

xn -1 = 6

2. Find,, xn –

1, using your calculator for the following numbers 19, 11, 12, 20

Solution

=62

= 15.5

X n – 1 = 4.65

QUESTION

1. Change the following angles to radians

i) 90° = 1.57 rad

ii) 210°= 3.67 rad

iii) 60° = 1.05 rad

iv) 360° = 6.28 rad

2. Change the following radians to angles

i) 1.732 rad= 99.24

ii) 3.12 rad = 178.76

iii) 6.28 rad =359.82

iv) 0.5 rad =28.65

3. Calculate the following 24° 8’ + 85.34 rad – 60° 31’

4. Using statistical functions from your calculator. Find, , n -1

i) 1, 3, 4, 4, 8

n -1= 2.55

ii) 0.1, 2.4, 0.8, 1 =4.3 , =1.075 , n -1 = 0.9639

iii) 0.9, 2.9, 3.9, 3.9, 7.9 n -1=2.55

iv) 17, 18, 20, 22, 23 , n -1= 2.55

v) -10,-5, 5, 15, 20, , n -1= 127.5

vi) 17, 17, 17, 17, 21, 21, 25, 25, 26 , n -1= 3.87

vii) 9.81, 9.81, 9.82, 9.82, 9.18, 9.18, 9.18, 9.84, 9.84, 9.84 , n -1= 0.011

More questions

1. Calculate the following

i) Correct to four decimal places …. -1.751365301 1.7514

ii) Correct to 4 decimal places… 0.855861129

2. Find, ,xn – 1 of 64, 44, 56 and 66… , n -1=9.98

3. Calculate

i) Correct to 4 decimal places

ii) Correct to 6 decimal places

iii) Correct to 5 decimal places

Examples

1. Find, , n – 1. For the following frequency distribution

Solution

= 6,745

= 67.45

n – 1 = 2.93

2. i) Calculate, , n – 1 for the following data

= 46,736

= 66.77

n – 1 = 2.29

iii)

= 1.91

= 1. 77

n -1 = 2.94

iv)

= 1632

= 18.13

n – 1 = 6.31

2. Express your answer in

i) Degree and minutes

ii) Radians

i) 25° 11’ + 20.6 rad – 55’

= 25° 11’ + 1, 180.29° – 55

= 1204° 33’

= 21.02rad

ii) 0.8rad + 16.4° + 73.8rad – 120° 54’

= 0.8rad + 0.29rad + 73.8rad – 2.11rad

= 72.78rad

= 4169° 45’

iii) 71° 41’ 22’’ + 29.8rad – 16.4°

= 71° 41’ 22’’ + 1,707.41° – 16.4°

= 1762° 41’

= 30.76rad

3. Calculate the following

i) Correct to 6 decimal place

= 1.027684683

≈ 1.027685

ii) Correct to 6 decimal places

= 3.2520609

Good day! Do you know if they make any plugins to help with Search Engine Optimization? I’m trying to get my blog to rank for some targeted keywords but

I’m not seeing very good results. If you know of any please

share. Appreciate it!

As the admin of this site is working, no uncertainty very quickly it will be famous,

due to its feature contents.

Hey there! I just want to offer you a huge thumbs up for the

excellent info you have right here on this post.

I’ll be coming back to your blog for more soon.

This design is steller! You certainly know

how to keep a reader entertained. Between your wit and your videos,

I was almost moved to start my own blog (well, almost…HaHa!) Wonderful job.

I really enjoyed what you had to say, and more than that, how you presented it.

Too cool!

This is the perfect blog for anybody who wants to understand this topic.

You realize a whole lot its almost hard to argue with you (not that

I personally would want to…HaHa). You definitely put a brand new spin on a subject that’s been discussed for a long time.

Great stuff, just great!

I’m not sure why but this web site is loading incredibly slow for

me. Is anyone else having this problem or is it a problem on my

end? I’ll check back later on and see if the problem still exists.

For latest news you have to go to see the web and on web I found this

website as a finest website for hottest updates.

Hello, I check your blogs on a regular basis.

Your writing style is awesome, keep up the good work!

It’s remarkable in favor of me to have a website,

which is helpful designed for my know-how. thanks admin

Hey there I am so delighted I found your webpage, I really found

you by error, while I was researching on Yahoo for something

else, Regardless I am here now and would just like

to say thanks a lot for a incredible post and a all round exciting blog (I also

love the theme/design), I don’t have time to go through it all at the minute but I have

saved it and also added your RSS feeds, so when I have time I

will be back to read a great deal more, Please do keep up the superb work.

Usually I don’t learn article on blogs, but I wish to say that

this write-up very compelled me to take a look at and do it!

Your writing taste has been surprised me. Thanks, quite great

post.

Excellent beat ! I wish to apprentice while you amend your web site, how

could i subscribe for a blog web site? The account

aided me a acceptable deal. I had been tiny bit acquainted of this your

broadcast offered bright clear idea

Today, while I was at work, my cousin stole my apple ipad and tested to see if

it can survive a thirty foot drop, just so she can be

a youtube sensation. My apple ipad is now broken and she has 83 views.

I know this is entirely off topic but I had to share it

with someone!