### Home > CALC > Chapter 12 > Lesson 12.1.2 > Problem12-26

12-26.

Multiple Choice: The length of the path described by $y =\operatorname{tan} x$ , where $0 \leq x \leq \frac { \pi } { 4 }$, is given by:

1. $\int _ { 0 } ^ { \pi / 4 } \sqrt { 1 + \operatorname { sec } ^ { 4 } x } d x$

1. $\int _ { 0 } ^ { \pi / 4 } \sqrt { 1 + \operatorname { tan } ^ { 2 } x } d x$

1. $\int _ { 0 } ^ { \pi / 4 } \operatorname { sec } x d x$

1. $\int _ { 0 } ^ { \pi / 4 } \operatorname { sec } ^ { 2 } x d x$

1. $\int _ { 0 } ^ { \pi / 4 } ( 1 + \operatorname { sec } ^ { 4 } x ) d x$