# HW6 - economy and the worldwide telecommunication...

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HW6 Tian Gu Code: 815 10/12/2010 Problem 1 1. What is telecommunication? Telecommunication is the transmission of messages, over significant distances, for the purpose of communication. 2. Provide a brief description of the historical developments in telecommunication. Who are the founders of the area? Guglielmo Marconi, Charles Wheatstone, Samuel Morse , Alexander Graham Bell , Nikola Tesla, Edwin Armstrong, Lee de Forest , John Logie Baird and Philo Farnsworth . What are some of the major developments in the area During the middle ages, chains of beacons were commonly used on hilltops as a means of relaying a signal. The first breakthrough into modern electrical telecommunications came with the push to fully develop the telegraph starting in the 1830s. Telecommunications play an important role in the world

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Unformatted text preview: economy and the worldwide telecommunication industry's revenue was estimated to be \$3.85 trillion in 2008. How are we using telecommunication today? We use it for the telegraph, the telephone Radio, television Computer networks and the Internet Problem #2 Given the following matrices a) find A+C A+C=) b) A-1 and check your answer Det A=3*-2-2*-1=-4 A-1= Inverse of A = ()= -()=() c) A*(C+D) A*(C+D)=)()=()=() Problem # 3 Given the following vectors A=2i +j B= -3i+2j a) Find A+B and A-B and draw the vectors b) Find A.B c) Find the angle between A and B d) What is AxB e) What is the areas of parallelogram that A and B make? Problem # 4 a) 5-2j= Re ja find R and a R= b) 6-B= re jp/6 B and r r=4 B=-2j...
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HW6 - economy and the worldwide telecommunication...

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