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OpenStudy (anonymous):
What is the range of the graph of y = cos x? A. All Real Numbers B. (0, 1) C. -1 ≤ y ≤ 1 D. -90, 90, 270, 450, ...
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OpenStudy (anonymous):
cos x can only take values between -1 and 1 inclusive, whatever you may put for x, so C.
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