(d^2)/(dx^2)(cos(pix))

Lösung

\frac{d ^{2}}{d x ^{2}} (cos (π x))

- π^{2} cos (π x)

Schritte zur Lösung

\frac{d ^{2}}{d x ^{2}} (cos (π x))

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

= \frac{d}{d x} (- sin (π x) π)

\frac{d}{d x} (- sin (π x) π) = - π^{2} cos (π x)

= - π^{2} cos (π x)

\int \frac{8}{x ^{2} + 9} d x

in v erse l a pl a ce \frac{1}{4 s + 7}

\int 12 x^{2} (1 - x) d x

\int tan^{3} (θ) sec (θ) d θ

\frac{d y}{d t} + 2 y = t e^{- 2 t}