Mathematics

Problem

Which of the following equals the Maclaurin series for

\cos x

truncated after the

x^{4}

term? a)

1+\dfrac{x^{2}}{2!}+\dfrac{x^{4}}{4!}

1-\dfrac{x^{2}}{2}+\dfrac{x^{4}}{4}

1-\dfrac{x^{2}}{2!}+\dfrac{x^{4}}{4!}

1-\dfrac{x^{2}}{2!}+\dfrac{x^{3}}{3!}-\dfrac{x^{4}}{4!}