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For what values of d do the functions y = cos x and y = cos(x – d) have the same values? Explain?

by Guest58690  |  earlier

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For what values of d do the functions y = cos x and y = cos(x – d) have the same values? Explain?

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  1. Greetings,

    If d is a multiple of 2*pi the same values are attained for both functions since 2*pi is the period of the cosine.

    Shifting it by a multiple of 2*pi leaves the curve with the same values.

    Regards

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