Math Problem Statement

Find the derivative of y = tan(sin^2(x)).

Solution

The given function is: y=tan(sin2(x))y = \tan(\sin^2(x))

To find the derivative dydx\frac{dy}{dx}, let's go through the steps.

Step 1: Differentiate yy with respect to xx

Since y=tan(sin2(x))y = \tan(\sin^2(x)), we need to use the chain rule. Let: u=sin2(x)u = \sin^2(x) and y=tan(u)y = \tan(u)

Then dydx=dydududx\frac{dy}{dx} = \frac{dy}{du} \cdot \frac{du}{dx}.

Step 2: Differentiate y=tan(u)y = \tan(u) with respect to uu

The derivative of tan(u)\tan(u) with respect to uu is: dydu=sec2(u)\frac{dy}{du} = \sec^2(u)

Step 3: Differentiate u=sin2(x)u = \sin^2(x) with respect to xx

Since u=sin2(x)u = \sin^2(x), use the chain rule again: dudx=2sin(x)cos(x)=sin(2x)\frac{du}{dx} = 2\sin(x) \cdot \cos(x) = \sin(2x) (using the double-angle identity for sine: sin(2x)=2sin(x)cos(x)\sin(2x) = 2\sin(x)\cos(x)).

Step 4: Combine the results

Now we can combine these derivatives: dydx=sec2(sin2(x))sin(2x)\frac{dy}{dx} = \sec^2(\sin^2(x)) \cdot \sin(2x)

Final Answer

dydx=sec2(sin2(x))sin(2x)\frac{dy}{dx} = \sec^2(\sin^2(x)) \cdot \sin(2x)

Would you like more details on any of the steps? Here are some related questions that could expand on this topic:

  1. How would you find the second derivative of y=tan(sin2(x))y = \tan(\sin^2(x))?
  2. What is the behavior of sec2(sin2(x))sin(2x)\sec^2(\sin^2(x)) \cdot \sin(2x) for large values of xx?
  3. How does the chain rule apply to functions with multiple nested layers?
  4. What would be the derivative if the function were y=tan(cos2(x))y = \tan(\cos^2(x)) instead?
  5. Can you explain why the double-angle identity for sine is useful here?

Tip: When taking derivatives involving trigonometric functions, keep trigonometric identities in mind as they often simplify the expression.

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Math Problem Analysis

Mathematical Concepts

Calculus
Differentiation
Trigonometric Functions

Formulas

Chain Rule: dy/dx = dy/du * du/dx
Derivative of tan(u): d(tan(u))/du = sec^2(u)
Double-Angle Identity: sin(2x) = 2sin(x)cos(x)

Theorems

Chain Rule

Suitable Grade Level

Grades 11-12