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quickstudent:
What is the range of f(x) = cos(x)? a. -1≤y≤1 b. y≤0 c. y≥0 d. all real numbers
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Elsa213:
This might help: http://www.chegg.com/homework-help/questions-and-answers/range-f-x-cos-x-real-numbers-1y1-q5580222
Elsa213:
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