I'm given a complex function in the exponential form:(adsbygoogle = window.adsbygoogle || []).push({});

2.5j e^(-j40*pi)

Transforming this into the standard Cartesian form is pretty straight forward, but the extra j multiplying the 2.5 is kind of throwing me off. I don't know if I did it right, but this is what I did:

2.5j (cos[-40pi] + jsin[-40pi]) = 2.5j (cos[40pi] - jsin[40pi]) = 2.5j (1-0) = 2.5j

Is that correct? I don't know if it is or not, because I don't see how you could transform it back into the original form after putting it into Cartesian form. Thanks

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# Homework Help: Expressing complex function in standard rectangular form

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