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Mathematics 20 Online
OpenStudy (anonymous):

Complex numbers, unlike other topics, is so difficult to understand! :(((

OpenStudy (mokeira):

do you have a question i can use to explain to you

OpenStudy (anonymous):

how do you know which quadrant does a complex number lies on ?

OpenStudy (anonymous):

how do you know which quadrant does a complex number lies on in the argand diagram ?

OpenStudy (mokeira):

Quadrant 1 is the upper right part, Quadrant 2 is the upper left part, Quadrant 3 is the lower left part, and Quadrant 4 is the lower right part. The x-axis is for the real part of the number. So if the real part of the number is positive, it will be on the right (in either Quadrant 1 or 4). If the real part is negative, it will be on the left (Quadrant 2 or 3). The y-axis is for the imaginary part of the number. So if the imaginary part is positive, it will be on the top (Quadrant 1 or 2). If the imaginary part is negative, it will be on the bottom (Quadrant 3 or 4).

OpenStudy (anonymous):

im only given \[\arg(a + ib) = \theta\]

OpenStudy (mokeira):

ok...now im stuck too lol

OpenStudy (mokeira):

@midhun.madhu1987

OpenStudy (anonymous):

he ask me to find the value of \[\arg(a - ib) , \arg(-a + ib), \arg(-a-ib)\]

OpenStudy (mokeira):

hmmm.... i dont even know how to do that. how do you do that? @HatcrewS

OpenStudy (anonymous):

|dw:1408429677232:dw| @Mokeira

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