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F(x)= - 4Sin(x)Cos (x) on (-Ï, Ï) Required: a. Find the critical numbers of f. b. Determine the intervals on which is increasing and decreasing.
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F(x)= - 4Sin(x)Cos (x) on (-Ï, Ï)

Required:

a. Find the critical numbers of f.

b. Determine the intervals on which is increasing and decreasing.

User Yury Schkatula
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User Wilsontgh
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