展开 (75(-cos(pit)+1))/(pit)

解答

展开

\frac{75 ( - cos ( π t ) + 1 )}{π t}

- \frac{75 cos ( π t )}{π t} + \frac{75}{π t}

求解步骤

\frac{75 ( - cos ( π t ) + 1 )}{π t}

乘开

75 (- cos (π t) + 1) : - 75 cos (π t) + 75

= \frac{- 75 cos ( π t ) + 75}{π t}

使用分式法则:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{- 75 cos ( π t ) + 75}{π t} = - \frac{75 cos ( π t )}{π t} + \frac{75}{π t}

= - \frac{75 cos ( π t )}{π t} + \frac{75}{π t}

e x p an d \frac{( ( x + 3 ) \cdot ( x - 4 ) )}{2}

e x p an d - \frac{27 ( n + 1 )}{2}

e x p an d A (e^{x^{2}} + 2 e^{x^{2}} x^{2})

e x p an d cos ((\frac{π}{8} + π) x)

e x p an d 1 2^{2}