Known Maclaurin series for cos(x): cos(x) = sum of (-1) to the n times x to the (2n) / (2n)! = 1 - x squared/2! + x to the fourth/4! - ...
How to apply it: Use the cos(x) series as the derivative of the sin(x) series or directly.
Course: AP Calculus BC · Unit: Infinite Sequences and Series
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