Hoe to compute this

**anderson** · June 5th 2010, 10:01 AM

Hi everyone,

I am studying discrete Fourier transform, i dont know how to input this into my calculator, im using Casio570ES.

$e^{-i2\pi}$ , the answer is 1.
$e^{-i\frac{3\pi}{2}}$ , im suppose to get i

can someone help me, thank you in advance for all your help & support,really appreciate.

**AllanCuz** · June 5th 2010, 10:13 AM

Originally Posted by anderson

Hi everyone,

I am studying discrete Fourier transform, i dont know how to input this into my calculator, im using Casio570ES.

$e^{-i2\pi}$ , the answer is 1.
$e^{-i\frac{3\pi}{2}}$ , im suppose to get i

can someone help me, thank you in advance for all your help & support,really appreciate.

Not sure how to put this into the calculator directly, but you can use eulers formula to input it.

$e^{-i2\pi} = cos( 2 \pi ) - i sin( 2 \pi ) = 1 - 0 = 1$

$e^{-i\frac{3\pi}{2}} = cos( \frac{3\pi}{2} ) - i sin( \frac{3\pi}{2} ) = 0 -i(-1) = i$

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