For x greater than or equal to zero and less than or equal to 2 pi,

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September 2, 2011 at 5:38 am #1921

ahprofessional
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For x greater than or equal to zero and less than or equal to 2 pi, sin x and cos x are both decreasing on the intervals

A. (0 , pi/2)

B. (pi/2 , pi)

C. (pi , 3 pi / 2)

D. (3 pi / 2 , 2 pi)

September 2, 2011 at 5:38 am #10506

john Smith
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Answer: (pi/2 , pi)
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