sec(x) has a trigonometric series that is given by _______

• A. ∞∑n=0 ((-1)nE2n / (2n)!)*x2n
• B. ∞∑n=0 ((-1)nE2n)
• C. ((-1)nB2n / (2n)!)*x2n
• D. ∞∑n=0 ((2n)!)*x2n+1