# What is the second derivative of f(x) = 3x^2 - sin x + cos x + 4

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The function f(x) = 3x^2 - sin x + cos x + 4

The first derivative f'(x) = 6x - cos x - sin x

The second derivative f''(x) = 6 + sin x - cos x

**The second derivative of f(x) = 3x^2 - sin x + cos x + 4 is f''(x) = 6 + sin x - cos x**