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# Common Maclaurin Series

APCALC-B41KLW

If the Maclaurin series for $f(x)$ is given by:

$$\sum _{ n=0 }^{ \infty }{ \cfrac { { ( -1 ) }^{ n }{ ( 2x ) }^{ 2n } }{ ( 2n ) ! } }$$

...identify which common function represents the series.

A

$\cos x$

B

$\cos(2x)$

C

$e^x$

D

$e^{2x}$

E

$\sin(2x)$