# Derivative of sin^5 x [by Chain Rule] | sin^5x Derivative

The derivative of sin5x is equal to 5sin4x cosx. In this post, we will learn how to differentiate sin5x, that is, sine to the power 5 of x.

## Derivative of sin5x Formula:

The derivative of sin5x is denoted by $\dfrac{d}{dx}(\sin^5 x)$ or $(\sin^5 x)’$. The formula of the derivative of sin5x is given below:

$\dfrac{d}{dx}(\sin^5 x)=5\sin^4 x \cos x$, or $(\sin^5 x)’$=5sin4x cosx.

Derivative of sin5x

Question: What is the Derivative of sin5x?

Answer: The Derivative of sin5x is 5sin4x cosx.

Proof:

Step 1: Let us assume that z=sin x. Then we can write our function as

sin5x=z5

Step 2: Note that $\dfrac{dz}{dx}=\cos x$ as $z=\sin x$.

Step 3: By the chain rule, the derivative of $\sin^5x$ will be equal to

$\dfrac{d}{dx}(\sin^5x)=\dfrac{d}{dz}(z^5) \cdot \dfrac{dz}{dx}$

$=5z^4 \cdot (\cos x)$ by the power rule of derivatives: $\dfrac{d}{dx}(x^n)=nx^{n-1}$

$=5\sin^4 x \cdot \cos x$ as $z=\sin x$

$=5\sin^4 x \cos x$.

Conclusion: The derivative of sin5x is 5sin4x cosx and this is obtained by the chain rule and the power rule of derivatives.

In a similar way, one can obtain the derivative of sinn x, which is given below:

$\dfrac{d}{dx}(\sin^n x)=n\sin^{n-1} x \cos x$.

For example,

1. The derivative of sin2x is 2sin x cos x.
2. The derivative of sin3x is 3sin2 x cos x.
3. The derivative of sin4x is 4sin3 x cos x.