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Question Number 175285 by MathsFan last updated on 26/Aug/22

simplfy   sinh(log2)

$$\mathrm{simplfy} \\ $$$$\:\boldsymbol{\mathrm{sinh}}\left(\boldsymbol{\mathrm{log}}\mathrm{2}\right) \\ $$

Answered by MJS_new last updated on 26/Aug/22

sinh x =((e^x −e^(−x) )/2)  ⇒ answer is (3/4)

$$\mathrm{sinh}\:{x}\:=\frac{\mathrm{e}^{{x}} −\mathrm{e}^{−{x}} }{\mathrm{2}} \\ $$$$\Rightarrow\:\mathrm{answer}\:\mathrm{is}\:\frac{\mathrm{3}}{\mathrm{4}} \\ $$

Commented by MathsFan last updated on 26/Aug/22

can you please expand it furter?

$$\mathrm{can}\:\mathrm{you}\:\mathrm{please}\:\mathrm{expand}\:\mathrm{it}\:\mathrm{furter}? \\ $$

Commented by MJS_new last updated on 26/Aug/22

e^(ln x) =x  there′s nothing difficult

$$\mathrm{e}^{\mathrm{ln}\:{x}} ={x} \\ $$$$\mathrm{there}'\mathrm{s}\:\mathrm{nothing}\:\mathrm{difficult} \\ $$

Answered by MikeH last updated on 26/Aug/22

sinh (ln 2) = ((e^(ln2)  −e^(−ln2)   )/2) = ((2−(1/2))/2) = (3/4)

$$\mathrm{sinh}\:\left(\mathrm{ln}\:\mathrm{2}\right)\:=\:\frac{{e}^{\mathrm{ln2}} \:−{e}^{−\mathrm{ln2}} \:\:}{\mathrm{2}}\:=\:\frac{\mathrm{2}−\frac{\mathrm{1}}{\mathrm{2}}}{\mathrm{2}}\:=\:\frac{\mathrm{3}}{\mathrm{4}} \\ $$

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