Write-down-the-expansion-of-a-cosx-b-1-l-x-and-hence-show-that-cosx-1-x-1-x-x-2-2-x-3-2-13x-4-24-M-m-

Question Number 185450 by Mastermind last updated on 22/Jan/23

Write down the expansion of

(a) cosx (b) \frac{1}{l + x}, and hence show

that \frac{cosx}{1 + x} = 1 - x + \frac{x^{2}}{2} - \frac{x^{3}}{2} + \frac{{13 x}^{4}}{24} + \dots

M . m

Commented by Mastermind last updated on 22/Jan/23

Hi