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8 August, 05:09

In two or more complete sentences describe why the range of y = cos (x) is - 1 ≤ y ≤ 1

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  1. D
    8 August, 06:04
    0
    The domain would be the x variable, which is undefined so can be any real number.

    The magnitude of the term is the absolute value of the coefficient. Since the equation does not contain a coefficient, the magnitude becomes 1.

    The lower bound of the range is the negative magnitude which would be - 1 and the upper bound is the magnitude, which is 1.

    So the range is equal to - 1 ≤ y ≤ 1
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