The power series expansion for sin is:

sin x = x - $\displaystyle {x^{3} \over 3!}$ + $\displaystyle {x^{5} \over 5!}$ - $\displaystyle {x^{7} \over 7!}$ + ...

and for cos is:

cos x = 1 - $\displaystyle {x^{2} \over 2!}$ + $\displaystyle {x^{4} \over 4!}$ - $\displaystyle {x^{6} \over 6!}$ + ...

= = 11 = 12 = pt = pt = = sp

` = `= `=อก

\begin{displaymath}\mathcode \lq \- = 32768 %%% just a bodge to improve alignment... ....3) \SIN (1.4) \SIN (1.5) \SIN (1.6) \noalign {\hrule }} } \end{displaymath}

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