Pauletta423 Pauletta423

28-08-2014
Mathematics

Answered

How do you use the product rule to find the derivative of y=x√⋅cos(x)y=sqrt(x)*cos(x) ?

Answer :

konrad509 konrad509

28-08-2014

[tex]y=\sqrt x\cos x\\ y'=(\sqrt x)'\cos x+\sqrt x (\cos x)'\\ y'=\frac{1}{2\sqrt x}\cos x+\sqrt x\cdot(-\sin x)\\ y'=\frac{1}{2\sqrt x}\cos x-\sqrt x\sin x\\ [/tex]

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