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人気のある微分積分 >

(d^2)/(dx^2)(cos(3x))

解

\frac{d ^{2}}{d x ^{2}} (cos (3 x))

解

- 9 cos (3 x)

解答ステップ

\frac{d ^{2}}{d x ^{2}} (cos (3 x))

\frac{d}{d x} (cos (3 x)) = - sin (3 x) \cdot 3

= \frac{d}{d x} (- sin (3 x) \cdot 3)

\frac{d}{d x} (- sin (3 x) \cdot 3) = - 9 cos (3 x)

= - 9 cos (3 x)

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