Handout
Purple Math

Purplemath: Inverses of Trigonometric Ratios

For Students 9th - 10th Standards
You know that you can take side lengths and find trig ratios, and you know you can find trig ratios (in your calculator) for angles. What is missing is a way to go from the ratios back to the original angles. And that is what "inverse...
Handout
Johan Claeys

Math Abundance: Inverse Trigonometric Functions = Cyclometric Functions

For Students 9th - 10th Standards
Explains the inverse trigonometric functions using examples.
Handout
Paul Dawkins

Paul's Online Notes: Derivatives of Inverse Trig Functions

For Students 10th - 12th
Online notes with examples and solutions.
Activity
Paul Dawkins

Paul's Online Notes: Solving Trigonometric Equations

For Students 9th - 10th
n this section we will discuss solving trig equations when the answer will (generally) require the use of a calculator (i.e. they aren't one of the standard angles). Note however, the process used here is identical to that for when the...
Activity
Windstream

Ojk's Pre Calculus Study Page: The Four Other Trig Functions

For Students 9th - 10th Standards
Trigonometry ratios and their signs are given in this explanation of the other trig functions. Graphs of tangent, cotangent, secant, and cosecant are given. Examples are included.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Srt Finding the Area of an Equilateral Triangle

For Teachers 9th - 10th Standards
This task examines how to calculate the area of an equilateral triangle two ways: using triangle congruence and using trigonometric ratios. Aligns with G-CO.C.10 and G-SRT.C.
Unit Plan
Khan Academy

Khan Academy: Trigonometric Ratios in Right Triangles

For Students 9th - 10th Standards
Learn how to find the sine, cosine, and tangent of angles in right triangles.
Unit Plan
CK-12 Foundation

Ck 12: Exact Values for Inverse Sine, Cosine, and Tangent

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Find all angles on the unit circle matching exact trig ratios. Resource includes examples, videos, and practice problems.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Unit Circle

For Students 9th - 10th Standards
Two hands-on lab activities for instructors to use when teaching about the coordinate graphs of the sine, cosine, and tangent functions derived from a unit circle. The graphs of the reciprocals of the three functions are investigated....
Unit Plan
Khan Academy

Khan Academy: Solving for a Side in Right Triangles With Trigonometry

For Students 9th - 10th Standards
Learn how to use trig functions to find an unknown side length in a right triangle.
Handout
University of Guelph

University of Guelph: Trigonometry Tutorial

For Students 9th - 10th Standards
A guide to calculating trigonometric functions.
Unknown Type
Other

Mecca: Review for Trigonometric Functions

For Students 9th - 10th Standards
A page of review problems on trigonometric functions. Answers are supplied.