What is the derivative of cos(x^3*3x^2) ?

The derivative of cos(x^3*3x^2) is 3(-3x^4sin(x^3)+2xcos(x^3))

What is the first derivative of cos(x^3*3x^2) ?

The first derivative of cos(x^3*3x^2) is 3(-3x^4sin(x^3)+2xcos(x^3))

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\frac{d}{d x} (cos (x^{3}) \cdot 3 x^{2})

3 (- 3 x^{4} sin (x^{3}) + 2 x cos (x^{3}))

Solution steps

\frac{d}{d x} (cos (x^{3}) \cdot 3 x^{2})

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

= 3 \frac{d}{d x} (cos (x^{3}) x^{2})

Apply the Product Rule:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = cos (x^{3}), g = x^{2}

= 3 (\frac{d}{d x} (cos (x^{3})) x^{2} + \frac{d}{d x} (x^{2}) cos (x^{3}))

\frac{d}{d x} (cos (x^{3})) = - sin (x^{3}) \cdot 3 x^{2}

\frac{d}{d x} (x^{2}) = 2 x

= 3 ((- sin (x^{3}) \cdot 3 x^{2}) x^{2} + 2 x cos (x^{3}))

Simplify

3 ((- sin (x^{3}) \cdot 3 x^{2}) x^{2} + 2 x cos (x^{3})) : 3 (- 3 x^{4} sin (x^{3}) + 2 x cos (x^{3}))

= 3 (- 3 x^{4} sin (x^{3}) + 2 x cos (x^{3}))

What is the derivative of cos(x^3*3x^2) ?
The derivative of cos(x^3*3x^2) is 3(-3x^4sin(x^3)+2xcos(x^3))
What is the first derivative of cos(x^3*3x^2) ?
The first derivative of cos(x^3*3x^2) is 3(-3x^4sin(x^3)+2xcos(x^3))