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sec(x) has a trigonometric series that is given by _______(a) ∞∑n=0 ((-1)^nE2n / (2n)!)*x^2n(b) ∞∑n=0 ((-1)^nE2n)(c) ((-1)^nB2n / (2n)!)*x^2n(d) ∞∑n=0 ((2n)!)*x^2n+1I have been asked this question in a national level competition.Query is from Discrete Probability topic in chapter Discrete Probability of Discrete Mathematics

Answer»

The CORRECT choice is (a) ∞∑n=0 ((-1)^nE2n / (2n)!)*x^2n

Easy EXPLANATION: A trigonometric SERIES is an example of a Maclaurin series. Here, sec(x) can be REPRESENTED as ∞∑n=0 ((-1)^nE2n / (2n)!)*x^2n.



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