Math Problem Statement
Jika f(x) = (1 – 4x) cos (x + π/4) dan f'(x) adalah turunan pertama dari fungsi f(x), maka nilai dari f'(π/4) adalah ….
Solution
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Math Problem Analysis
Mathematical Concepts
Calculus
Differentiation
Product Rule
Trigonometric Functions
Formulas
Product Rule: (u ⋅ v)' = u'v + uv'
Derivative of cos(x): d/dx[cos(x)] = -sin(x)
Theorems
Product Rule in Differentiation
Trigonometric Derivatives
Suitable Grade Level
Grade 11-12
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