Complex Numbers and Applications ME50 ADVANCED ENGINEERING MATHEMATICS 1 Complex Numbers √ A complex number is an ordered pair (x‚ y) of real numbers x and y. For example‚ (−2.1‚ 3.5)‚ (π‚ 2)‚ (0‚ 0) are complex numbers. Let z = (x‚ y) be a complex number. The real part of z‚ denoted by Re z‚ is the real number x. The imaginary part of z‚ denoted by Im z‚ is the real number y. Re z = x Im z = y Two complex numbers z1 = (a1‚ b1) and z2 = (a2‚ b2) are equal‚ written z1 = z2 or (a1‚ b1) = (a2‚ b2)
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abbreviations sec (instead of s)‚ gm (instead of g)‚ and nt (instead of N) are also used. System of units Length Mass Time Force cgs system centimeter (cm) gram (g) second (s) dyne mks system meter (m) kilogram (kg) second (s) newton (nt) Engineering system foot (ft) slug second (s) pound (lb) 1 inch (in.) 2.540000 cm 1 foot (ft) 1 yard (yd) 3 ft 1 statute mile (mi) 5280 ft 1 mi2 2.5899881 km2 1 nautical mile 1 acre 91.440000 cm 6080 ft 4840 yd2 4046.8564 m2 1/128 U.S. gallon
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Technology in Math. Teaching (ICTMT 5)‚ Klagenfurt 2001 Mathematical Application Projects for Mechanical Engineers Concept‚ Guidelines and Examples Burkhard Alpers FH Aalen - University of Applied Sciences balper@fh-aalen.de http://www.fbm.fh-aalen.de/ Abstract: In this article‚ we present the concept of mathematical application projects as a means to enhance the capabilities of engineering students to use mathematics for solving problems in larger projects as well as to communicate and present
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1 Engineering Mathematics 1 (AQB10102) CHAPTER 1: NUMBERS AND ARITHMETIC 1.1 TYPE OF NUMBERS NEGATIVE INTEGER - POSITIVE AND REAL NUMBERS (R) • • Numbers that can be expressed as decimals Real Number System: • Consist of positive and negative natural numbers including 0 Example: …‚ -5‚ -4‚ -3‚ -2‚ -1‚ 0‚ 1‚ 2‚ 3‚ 4‚ 5‚ … • All numbers including natural numbers‚ whole numbers‚ integers‚ rational numbers and irrational numbers are real numbers Example: 4 = 4
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Complex Number System Arithmetic A complex number is an expression in the form: a + bi where a and b are real numbers. The symbol i is defined as √ 1. a is the real part of the complex number‚ and b is the complex part of the complex number. If a complex number has real part as a = 0‚ then it is called a pure imaginary number. All real numbers can be expressed as complex numbers with complex part b = 0. -5 + 2i 3i 10 real part –5; imaginary part 2 real part 0; imaginary part 3 real part 10; imaginary
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introduce the topic of “Complex and Imaginary Numbers” and its applications. I chose the topic “Complex and Imaginary Numbers” because I am interested in mathematics that is hard to be pictured in your mind‚ unlike geometry or equations. An imaginary number is the square root of a negative number. That is why they are called imaginary‚ what René Descartes called them‚ because he thought such a number could not exist. In this paper‚ I will discuss how complex numbers and imaginary numbers were discovered
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Abstract A complex number is a number that can be written in the form of a+bi where a and b are real numbers and i is the value of the square root of negative one. In the form a + bi‚ a is considered the real part and the bi is considered the imaginary part. The goal of this project is show how the use of complex numbers originates in the history of mathematics. Introduction Complex numbers are very important component of mathematics. They enable us to solve any polynomial equation of degree
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Introduction I. Number Systems in Mathematics: A Number system (or system of numeration) is a writing system for expressing numbers‚ that is a mathematical notation for representing number of a given set‚ using graphemes or symbols in a consistent manner. It can be seen as the context that allows the symbols "11" to be interpreted as the binary symbol for three‚ the decimal symbol for eleven‚ or a symbol for other numbers in different bases. Ideally‚ a number system will: * Represent a
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imfm.qxd 9/15/05 12:06 PM Page i INSTRUCTOR’S MANUAL FOR ADVANCED ENGINEERING MATHEMATICS imfm.qxd 9/15/05 12:06 PM Page ii imfm.qxd 9/15/05 12:06 PM Page iii INSTRUCTOR’S MANUAL FOR ADVANCED ENGINEERING MATHEMATICS NINTH EDITION ERWIN KREYSZIG Professor of Mathematics Ohio State University Columbus‚ Ohio JOHN WILEY & SONS‚ INC. imfm.qxd 9/15/05 12:06 PM Page iv Vice President and Publisher: Laurie Rosatone Editorial Assistant: Daniel
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Teaching Mathematics and Its Applications (2009) 28‚ 69^76 doi:10.1093/teamat/hrp003 Advance Access publication 13 March 2009 GeoGebra ç freedom to explore and learn* LINDA FAHLBERG-STOJANOVSKAy Department of Mathematics and Computer Sciences‚ University of St. Clement of Ohrid‚ Bitola‚ FYR Macedonia Downloaded from http://teamat.oxfordjournals.org/ at University of Melbourne Library on October 23‚ 2011 VITOMIR STOJANOVSKI Department of Mechanical Engineering‚ University of St. Clement
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