Find answers to the top 10 questions parents ask about TI graphing calculators.
Learn about the math and science behind what students are into, from art to fashion and more.
Discover new ways to help students succeed in math, science and STEM using TI technology.
Get hundreds of video lessons that show how to graph parent functions and transformations.
Texas Instruments
9-12
20 Minutes
Students discover the relationship between the trigonometric functions sine, cosine, and tangent and the side length ratios of a right triangle.
Students engage in an exploration of points and angles on the unit circle. Right triangle relationships are utilized to develop the relationship between angles and coordinates.
Students link their prior knowledge of special right triangles to identify coordinates for 30, 45, and 60 degree angles on the unit circle.
After establishing relationships in Quadrant I, students extend their knowledge through the application of symmetry to angles in Quadrants II, III, and IV.
TI websites use cookies to optimize site functionality and improve your experience. To find out more or to change your preferences, see our cookie policy page. Click Agree and Proceed to accept cookies and enter the site.
You can control your preferences for how we use cookies to collect and use information while you're on TI websites by adjusting the status of these categories.