What is the derivative of y=3cos^4(x) ?

The derivative of y=3cos^4(x) is -12cos^3(x)sin(x)

What is the first derivative of y=3cos^4(x) ?

The first derivative of y=3cos^4(x) is -12cos^3(x)sin(x)

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derivative of

y = 3 cos^{4} (x)

- 12 cos^{3} (x) sin (x)

Solution steps

\frac{d}{d x} (3 cos^{4} (x))

Take the constant out:

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

= 3 \frac{d}{d x} (cos^{4} (x))

Apply the chain rule:

4 (cos (x))^{3} \frac{d}{d x} (cos (x))

= 4 (cos (x))^{3} \frac{d}{d x} (cos (x))

\frac{d}{d x} (cos (x)) = - sin (x)

= 3 \cdot 4 (cos (x))^{3} (- sin (x))

Simplify

= - 12 cos^{3} (x) sin (x)

3 q^{2}

\frac{d}{dd} (d + 7)

(3 + x^{2})^{\frac{1}{2}}

\frac{- x}{( x - 1 )}

f (x) = (6 x^{2} + 7 x)^{4}

What is the derivative of y=3cos^4(x) ?
The derivative of y=3cos^4(x) is -12cos^3(x)sin(x)
What is the first derivative of y=3cos^4(x) ?
The first derivative of y=3cos^4(x) is -12cos^3(x)sin(x)