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# Chain Rule of Composite Functions of Cosine

SVCALC-VLKDLA

Find derivative of the function:

$$f(x)=\cos (\ln (x^2+1))$$

A

$-\cfrac{\sin(\ln(x^2+1))2x}{x^2+1}$

B

$\cfrac{\sin(\ln(x^2+1))2x}{x^2+1}$

C

$\cfrac{-\sin(\ln(x^2+1))}{x^2+1}$

D

$-\sin(\ln(x^2+1))$