Hello. I`m having trouble to prove this coplex identities, using the exponencial forms: 1) 2) where z is a complex number x+iy Thanks!
Last edited by hurz; Apr 10th 2011 at 03:22 AM.
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Originally Posted by hurz Hello. I`m having trouble to prove this coplex identities: 1) 2) where z is a complex number x+iy Thanks! Write tan(z) as sine over cosine
Originally Posted by dwsmith Write tan(z) as sine over cosine I did it already. See, i've done a lot of identities proofs, and i had trouble just in these 2. I already did the standard stuff. Thank's!
Originally Posted by hurz Hello. I`m having trouble to prove this coplex identities: 1) 2) where z is a complex number x+iy Thanks! Number one is a basic Trig identity. Look up Sum and Difference Formula.
Originally Posted by hurz Hello. I`m having trouble to prove this coplex identities: 1) 2) where z is a complex number x+iy Thanks! For 2, let and use double angle formulas.
I thought that, but the intention of these question is to use exponencial forms to prove them, not to import trigonometric identities to real numbers.
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