Math Problem Statement

If f(x)=4sinx/3+cosx, then f'(x)f′(x) =   

f'(3)f′(3) = 

Solution

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Math Problem Analysis

Mathematical Concepts

Differentiation
Trigonometric Functions

Formulas

Derivative of sin(x) is cos(x)
Derivative of cos(x) is -sin(x)
Chain Rule

Theorems

Differentiation Rules

Suitable Grade Level

Grades 11-12 (Calculus)