the derivative of f(y)=4sin^9(y

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Find the derivative of f(y)=4sin^9(y^6)

**Understanding and Finding the Derivative of a Trigonometric Function**

The problem provided asks us to find the derivative of \( f(y) = 4\sin^9\left( y^6 \right) \).

### Instructions:
1. **Enclose arguments of functions in parentheses.** 
   - For example, when you see \(\sin(2x)\), it indicates the sine of \(2x\).
   - Include a multiplication sign between symbols, so input this as \(\sin(2*x)\) when entering it manually.

2. **Writing the Power of a Trigonometric Function:**
   - When expressing the power of a trigonometric function, remember that writing \(\sin^4(x)\) is just a shorthand method.
   - To be mathematically correct and align with systems such as Mobius, you should write this as \((\sin(x))^4\).

### Solution:
To find the derivative \( f'(y) \), you will apply the chain rule.

### Explanation of Derivative Calculation:
1. **Given Function:**
   \[
   f(y) = 4\sin^9(y^6)
   \]
   
2. **Applying the Chain Rule:**
   - Let \(u = y^6\)
   - Hence, \(f(y) = 4\sin^9(u)\)
   - Then, \(f(y) = 4\left(\sin(u)\right)^9\)

3. **Differentiate with respect to \(u\):**
   \[
   \frac{d}{du}\left[4(\sin(u))^9\right] = 4 \cdot 9 (\sin(u))^8 \cdot \cos(u)
   \]
   - We have used the chain rule here, differentiating \((\sin(u))^9\) with respect to \(u\).

4. **Substitute back \(u = y^6\):**
   \[
   f'(y) = 36(\sin(y^6))^8 \cdot \cos(y^6) \cdot \frac{d}{dy}(y^6)
   \]

5. **Differentiate \(y^6\):**
   \[
   \frac{d}{dy}(y^6) = 6y^5
   \]

6. **Combine the results:**
Transcribed Image Text:**Understanding and Finding the Derivative of a Trigonometric Function** The problem provided asks us to find the derivative of \( f(y) = 4\sin^9\left( y^6 \right) \). ### Instructions: 1. **Enclose arguments of functions in parentheses.** - For example, when you see \(\sin(2x)\), it indicates the sine of \(2x\). - Include a multiplication sign between symbols, so input this as \(\sin(2*x)\) when entering it manually. 2. **Writing the Power of a Trigonometric Function:** - When expressing the power of a trigonometric function, remember that writing \(\sin^4(x)\) is just a shorthand method. - To be mathematically correct and align with systems such as Mobius, you should write this as \((\sin(x))^4\). ### Solution: To find the derivative \( f'(y) \), you will apply the chain rule. ### Explanation of Derivative Calculation: 1. **Given Function:** \[ f(y) = 4\sin^9(y^6) \] 2. **Applying the Chain Rule:** - Let \(u = y^6\) - Hence, \(f(y) = 4\sin^9(u)\) - Then, \(f(y) = 4\left(\sin(u)\right)^9\) 3. **Differentiate with respect to \(u\):** \[ \frac{d}{du}\left[4(\sin(u))^9\right] = 4 \cdot 9 (\sin(u))^8 \cdot \cos(u) \] - We have used the chain rule here, differentiating \((\sin(u))^9\) with respect to \(u\). 4. **Substitute back \(u = y^6\):** \[ f'(y) = 36(\sin(y^6))^8 \cdot \cos(y^6) \cdot \frac{d}{dy}(y^6) \] 5. **Differentiate \(y^6\):** \[ \frac{d}{dy}(y^6) = 6y^5 \] 6. **Combine the results:**
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