Sow that cosix e-xex2 and isinix e-x-ex2 this is


show that cos(ix)= e^-x+e^x/2 and isin(ix)= e^-x-e^x/2 this is expressions are called the hyperbolic cosine and hyperbolic sine, respectively, hint start with e^-x=e^i(ix) and e^x=e^i(-ix) and apply euler's formula

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Chemistry: Sow that cosix e-xex2 and isinix e-x-ex2 this is
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