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Apply the formula: $\frac{d}{dx}\left(x^a\right)$$=ax^{\left(a-1\right)}\frac{d}{dx}\left(x\right)$, where $a=3$ and $x=\mathrm{cosh}\left(3x\right)$
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$3\mathrm{cosh}\left(3x\right)^{2}\frac{d}{dx}\left(\mathrm{cosh}\left(3x\right)\right)$
Learn how to solve calcolo differenziale problems step by step online. d/dx(cosh(3x)^3). Apply the formula: \frac{d}{dx}\left(x^a\right)=ax^{\left(a-1\right)}\frac{d}{dx}\left(x\right), where a=3 and x=\mathrm{cosh}\left(3x\right). Apply the trigonometric identity: \frac{d}{dx}\left(\mathrm{cosh}\left(\theta \right)\right)=\frac{d}{dx}\left(\theta \right)\mathrm{sinh}\left(\theta \right), where x=3x. Apply the formula: \frac{d}{dx}\left(nx\right)=n\frac{d}{dx}\left(x\right), where n=3. Apply the formula: \frac{d}{dx}\left(x\right)=1.
