Which one is the Maclaurin series of the function z cos 2r3 ? (Hint: cos a...

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Which one is the Maclaurin series of the function z cos 2r3 ? (Hint: cos a = -1)" 22n (2n)! n=0 8 2n+1 (-1)" (2n)! n=0 4" z6n-1 E-1)" (2n)! n=0 80 4 6n+1 (2n)! n=0 2" 3n-1 E-1)" (2n)! n=0 80 2" 3n+1 (2n)! Which one is the Maclaurin series of the function z cos 2r3 ? (Hint: cos a = -1)" 22n (2n)! n=0 8 2n+1 (-1)" (2n)! n=0 4" z6n-1 E-1)" (2n)! n=0 80 4 6n+1 (2n)! n=0 2" 3n-1 E-1)" (2n)! n=0 80 2" 3n+1 (2n)!