### Home > CALC > Chapter 9 > Lesson 9.3.1 > Problem 9-82

9-82.

**Choice:**is equivalent to: Homework Help ✎ tan

*x*sec

^{2}(*x*)

This is the definition of derivative for tan^{–1}(*x*).

9-82.

**Choice:**is equivalent to: Homework Help ✎ tan

*x*sec

^{2}(*x*)

This is the definition of derivative for tan^{–1}(*x*).