Math Problem Statement

If y=sin(2x) 'then dy/dx=

Solution

Given y=sin(2x)y = \sin(2x), to find the derivative dydx\frac{dy}{dx}, we apply the chain rule.

The chain rule states that if y=f(g(x))y = f(g(x)), then:

dydx=f(g(x))g(x)\frac{dy}{dx} = f'(g(x)) \cdot g'(x)

Here, f(u)=sin(u)f(u) = \sin(u) and g(x)=2xg(x) = 2x, so applying the chain rule:

  1. The derivative of sin(u)\sin(u) with respect to uu is cos(u)\cos(u), so f(g(x))=cos(2x)f'(g(x)) = \cos(2x).
  2. The derivative of 2x2x with respect to xx is 2.

Therefore, combining these:

dydx=cos(2x)2=2cos(2x)\frac{dy}{dx} = \cos(2x) \cdot 2 = 2\cos(2x)

So, dydx=2cos(2x)\frac{dy}{dx} = 2\cos(2x).

Would you like a more detailed explanation or any clarifications?

5 Related Questions:

  1. How do you differentiate y=cos(3x)y = \cos(3x)?
  2. What is the second derivative of y=sin(2x)y = \sin(2x)?
  3. How does the chain rule apply in multi-variable calculus?
  4. What is the derivative of y=sin2(x)y = \sin^2(x)?
  5. Can you explain how to find the derivative of trigonometric functions?

Tip:

Always remember to check whether you need to apply the chain rule when differentiating composite functions.

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Math Problem Analysis

Mathematical Concepts

Calculus
Trigonometric Functions
Differentiation
Chain Rule

Formulas

Chain rule: dy/dx = f'(g(x)) * g'(x)
Derivative of sin(u): d/dx[sin(u)] = cos(u)

Theorems

Chain Rule

Suitable Grade Level

Grades 11-12 (High School) and College Calculus