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March 2nd, 2014, 01:43 AM   #1
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Real part of complex?

Hello!

Can someone help with this complex function?

f(x) =(e^3+i2x)/ix


how can I get the real part of the f(x)?

thanks a lot
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March 2nd, 2014, 05:23 AM   #2
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Re: Real part of complex?

It's in front of you. Just divide by ix.
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March 2nd, 2014, 10:16 AM   #3
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Re: Real part of complex?

the function should be

f(x) =(e^(3+i2x))/ix

typo.

can you solve it?

thanks.
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March 2nd, 2014, 12:46 PM   #4
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Re: Real part of complex?

Quote:
Originally Posted by archer18
the function should be

f(x) =(e^(3+i2x))/ix

typo.

can you solve it?

thanks.
Assuming x is real:

f(x) =(e^(3+i2x))/ix = -ie^3(cos2x + isin2x)/x = e^3(sin2x/x) -ie^3(cos2x/x)
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