### Home > PC3 > Chapter 13 > Lesson 13.1.3 > Problem 13-38

13-38.

Consider the equation

Solve the equation for the smallest positive value of

(in radians). If you are having trouble getting started, let. Substituting '

' into the equation:Using a calculator,

.

Substitute back to solve for.Graph

and on a graphing calculator. Use the symmetry of the graph to determine the next positive value ofwhere.