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Hyperbolic functions/R/Elementary properties/Fact/Proof/Exercise
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Hyperbolic functions/R/Elementary properties/Fact
Prove the following properties of the hyperbolic sine and the hyperbolic cosine
${}\cosh x+\sinh x=e^{x}\,.$
${}\cosh x-\sinh x=e^{-x}\,.$
${}(\cosh x)^{2}-(\sinh x)^{2}=1\,.$
Create a solution