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Inside this Book – In engineering,calculations often need to be performed. For simple numbers it is useful to be able to use men- tal arithmetic. However, when numbers are larger an electronic calculator needs to be used. There are several calculators on the market, many of which will be satisfactory for our needs. It is essential to have a scientific notation calculator which will have all the necessary functions needed and more. This chapter assumes you have a CASIO fx-83ES calculator, or similar, as shown in Figure 4.1. Besides straight forward addition, subtraction, multipli- cation and division, which you will already be able to do, we will check that you can use squares, cubes, powers, reciprocals, roots, fractions and trigonomet- ric functions (the latter in preparation for Chapter 21). There are several other functions on the calculator which we do not need to concern ourselves with at this level.
Inside this book –Basic Engineering Mathematics, Fifth Edition PDF Book by John Bird – Percentages are used to give a common standard. The use of percentages is very common in many aspects of commercial life, as well as in engineering. Interest rates, sale reductions, pay rises, exams and VAT are all examples of situations in which percentages are used. For this chapter you will need to know about decimals and fractions and be able to use a calculator. We are familiar with the symbol for percentage, i.e. %. Here are some examples. • Interest rates indicate the cost at which we can borrow money. If you borrow £8000 at a 6.5% interest rate for a year, it will cost you 6.5% of the amount borrowed to do so,which will need to be repaida long with the original money you borrowed. If you repay the loan in 1 year, how much interest will you have paid? • A pairoftrainersina shopcost £60. They are advertised in a sale as 20% off. How much will you pay? • If you earn £20000 p.a. and you receive a 2.5% pay rise, howmuch extra willyouhave tospend the followingyear?
Basic Engineering Mathematics, Fifth Edition by John Bird PDF : eBook Information
- Full Book Name – Basic Engineering Mathematics, Fifth Edition
- Author of this Book – John Bird
- Language – English
- Book Genre – Engineering, Mathematics, Science
- Download Format – PDF
- Size – 3.3 MB
- eBook Pages – 377
- Price – Free