Find all points with x-values on (0, 2π), where tangent line to the graph of f(x) is horizontal. f(x) = cos(2x) − sin2(x).

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter6: Applications Of The Derivative
Section6.3: Implicit Differentiation
Problem 26E
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Find all points with x-values on (0, 2π), where tangent line to the graph of f(x) is horizontal.
f(x) = cos(2x) − sin2(x).

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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,