Derivative of \( \displaystyle \frac{3 x}{2} - \frac{3 \sin{\left(4 x + 2 \right)}}{8} \)

Problem 2.218 · hard

1. \[ \frac{d}{d x} \left(\frac{3 x}{2} - \frac{3 \sin{\left(4 x + 2 \right)}}{8}\right) \]
   Start with the derivative of the function.✓ Proved
2. \[ = \frac{d}{d x} \frac{3 x}{2} - \frac{d}{d x} \frac{3 \sin{\left(4 x + 2 \right)}}{8} \]
   sum constant-multipleApply the sum rule. Factor out the constants from each term.✓ Proved
3. \[ = \frac{3 \frac{d}{d x} x}{2} - \frac{3 \frac{d}{d x} \sin{\left(4 x + 2 \right)}}{8} \]
   constant-multipleApply the constant multiple rule to both terms.✓ Proved
4. \[ = \frac{3}{2} - \frac{3 \frac{d}{d x} \sin{\left(4 x + 2 \right)}}{8} \]
   derivative algebraDifferentiate the first term. Simplify the first term.✓ Proved
5. \[ = - \frac{3 \cos{\left(4 x + 2 \right)} \frac{d}{d x} \left(4 x + 2\right)}{8} + \frac{3}{2} \]
   chainApply the chain rule to the second term.✓ Proved
6. \[ = \frac{3}{2} - \frac{3 \cos{\left(4 x + 2 \right)}}{2} \]
   derivative algebra simplifyDifferentiate the inner function 4*x + 2. Rearrange the terms. Simplify the coefficient 3/8 * 4.✓ Proved