### Home > CALC > Chapter 12 > Lesson 12.2.2 > Problem 12-81

12-81.

**Multiple Choice:**Which of the following integrals represents the length of the curve*y*= ln(cos*x*) from? Homework Help ✎

Now use the arc length formula.

Note: You will need to use one of the Pythagorean Identities to simplify your result.