Math Problem Statement
Find the intervals on which f is increasing and the intervals on which it is decreasing. f(x)equals=negative 3 cosine squared x−3cos2x on [minus−piπ,piπ
Solution
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Math Problem Analysis
Mathematical Concepts
Calculus
Trigonometry
Derivative
Increasing and Decreasing Intervals
Formulas
f'(x) = 9sin(2x)
sin(2x) = 2sin(x)cos(x)
Theorems
First Derivative Test
Double-Angle Identity
Suitable Grade Level
Grades 11-12
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