\[\underset{n\to \infty }{\mathop{\lim }}\,\sum\limits_{x=1}^{20}{{{\cos }^{2n}}(x-10)}\]is equal to

\[\underset{n\to \infty }{\mathop{\lim }}\,\sum\limits_{x=1}^{20}{{{\c

1.	\[\underset{n\to \infty }{\mathop{\lim }}\,\sum\limits_{x=1}^{20}{{{\cos }^{2n}}(x-10)}\]is equal to
A.	0
B.	1
C.	19
D.	20
Answer» C. 19

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\[\underset{n\to \infty }{\mathop{\lim }}\,\sum\limits_{x=1}^{20}{{{\cos }^{2n}}(x-10)}\]is equal to

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