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2. Find \( d y / d x \) of each using the derivative formulas and/or techniques. Circle your final answers in each case. You do not have to simplify your answers. (a) \( y=e^{-x} \sin ^{-1}(4 x) \) (b) \( y=\log \sqrt{\frac{x}{x^{2}+1}} \)
\( y=\cot ^{3}(\cos 3 x) \) \( y=(\sin x)^{\cos x} \) \( y=\ln \left(5^{\csc x}\right) \)

(a) since given that y=e?xsin?1(4x) dydx=