**Module 4 - Topic 2 - Trigonometric Equations**

"In Trigonometric Equations, students are introduced to strategies for solving trigonometric equations. Students use their knowledge of the unit circle, radian measures, and the graphical behaviors of trigonometric functions to solve sine, cosine, and tangent equations. To begin, they use tables and graphs to represent a given scenario. Students then represent the function and solve for unknown values algebraically." "Students recognize that there are infinitely many solutions for periodic functions unless there is a restricted domain, and they use periodicity identities to identify solution sets. Students use technology to determine inverse functions to solve equations. While they begin with two-step equations, they eventually solve problems where they must take into account a period change, and then solve problems involving trigonometric equations in quadratic form." -Carnegie Textbook |
"A sextant is an instrument for calculating latitude and longitude. It is based on trigonometry: the earth is a giant circle, and the angular position of the sun (or a given star) above the horizon defines the necessary triangle"
- Carnegie Textbook |