Hi , I'm stuck on part b) of the attached proving cosh(x-ln2)=sinh(x) .
Substituting and simplifying seems to give me e^(x)-e^(-x) and not with the half to prove the identity .
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Hi , I'm stuck on part b) of the attached proving cosh(x-ln2)=sinh(x) .
Substituting and simplifying seems to give me e^(x)-e^(-x) and not with the half to prove the identity .
Quote:
Originally Posted by minicooper58
I really do not follow what is going on in that attachment.
By here are two facts.
so