• S/2 csc²2x√√1+cot 2x dx TT/8

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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The only instructions are to "Define the Integral"

### Problem 68

Evaluate the integral:

\[ \int_{\pi/8}^{\pi/4} \csc^2(2x) \sqrt{1 + \cot(2x)} \, dx \]

---

This integral involves trigonometric functions and the given limits of integration. The tasks are to simplify, transform or directly integrate the given function within the bounds from \(\pi/8\) to \(\pi/4\). 

Analyzing the integrand:

\[ \csc^2(2x) \sqrt{1 + \cot(2x)} \]

- \(\csc(2x)\) is the cosecant function, which is the reciprocal of the sine function.
- \(\cot(2x)\) is the cotangent function, which is the reciprocal of the tangent function.

The integral might require specific trigonometric identities or substitution to simplify it into a more integrable form.

---

### Example Approach

1. **Trigonometric Substitution**:
   Convert the integral using a substitution that simplifies the expression involving \(\cot(2x)\).

2. **Simplification of the Integrand**:
   Use trigonometric identities to simplify \(\sqrt{1 + \cot(2x)}\) if possible.

3. **Integration**:
   Perform the integral after simplification or substitution, and evaluate at the given bounds.

By following these steps, you will be able to evaluate the integral accurately.
Transcribed Image Text:### Problem 68 Evaluate the integral: \[ \int_{\pi/8}^{\pi/4} \csc^2(2x) \sqrt{1 + \cot(2x)} \, dx \] --- This integral involves trigonometric functions and the given limits of integration. The tasks are to simplify, transform or directly integrate the given function within the bounds from \(\pi/8\) to \(\pi/4\). Analyzing the integrand: \[ \csc^2(2x) \sqrt{1 + \cot(2x)} \] - \(\csc(2x)\) is the cosecant function, which is the reciprocal of the sine function. - \(\cot(2x)\) is the cotangent function, which is the reciprocal of the tangent function. The integral might require specific trigonometric identities or substitution to simplify it into a more integrable form. --- ### Example Approach 1. **Trigonometric Substitution**: Convert the integral using a substitution that simplifies the expression involving \(\cot(2x)\). 2. **Simplification of the Integrand**: Use trigonometric identities to simplify \(\sqrt{1 + \cot(2x)}\) if possible. 3. **Integration**: Perform the integral after simplification or substitution, and evaluate at the given bounds. By following these steps, you will be able to evaluate the integral accurately.
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