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Mathematics 21 Online
OpenStudy (earthcitizen):

pls comment the graph plot of e^ix*pi/2

OpenStudy (anonymous):

put it this way: cos(xpi/2)+isin(xpi/2)

OpenStudy (earthcitizen):

\[\Large e^{ix\ \pi/2}\]

OpenStudy (earthcitizen):

what would you then say about the real and imaginary plot of the function ?

OpenStudy (anonymous):

it's just a plot of sinx and cosx

OpenStudy (earthcitizen):

anything else ?

OpenStudy (anonymous):

it's a circle

OpenStudy (earthcitizen):

how so ?

OpenStudy (anonymous):

|dw:1354441177835:dw|

OpenStudy (earthcitizen):

awesome , i see.So, you're saying it completes one revolution ?

OpenStudy (anonymous):

for every x=k4 for k=1,2,...n

OpenStudy (earthcitizen):

you had metioned something earlier about it's periodicity ?

OpenStudy (anonymous):

period 4

OpenStudy (anonymous):

since cos(xpi/2)=cos(4k*xpi/2) same for sin

OpenStudy (earthcitizen):

hmm..nicely said

OpenStudy (earthcitizen):

is there anything else ?

OpenStudy (perl):

here is what i would do

OpenStudy (perl):

|dw:1354443683303:dw|

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