Question

Which formula gives the x-coordinates of the maximum values for y = cos(x)? k pi for any integer k k pi for k = 0, plus-or-minus 2, plus-or-minus 4, ellipsis StartFraction k pi Over 2 EndFraction for any positive integer k StartFraction k pi Over 2 EndFraction for k = 0, plus-or-minus 2, plus-or-minus 4, ellipsis

Answer 1

B

Explanation:

Answer 2

k pi for k = 0, plus-or-minus 2, plus-or-minus 4, ellipsis

Explanation:

The cosine is a maximum when its argument is at multiples of 2π.

k pi for k = 0, plus-or-minus 2, plus-or-minus 4, ellipsis

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Both of us could probably read this more easily if you would use appropriate math symbols.