Which of the following defines a chebyshev polynomial of order N, TN(x

1.	Which of the following defines a chebyshev polynomial of order N, TN(x)?
A.	cos(Ncos<sup>-1</sup>x) for all x
B.	cosh(Ncosh<sup>-1</sup>x) for all x
C.	cos(Ncos<sup>-1</sup>x), \|x\|‚Äö√Ñ√∂‚àö¬¢¬¨√ü1
D.	, \|x\|>1
Answer» D. , \|x\|>1

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