Government of Alberta
Learn Alberta: Math Interactives: Exploring Trig Ratios
Investigate the cosine, sine, and tangent ratios of trigonometry using this interactive Learn Alberta math resource. Students will use these ratios to determine a right triangle's unknown side or angle. Be sure to follow the link to the...
University of Saskatchewan (Canada)
Exercises in Math Readiness for University Study: Trig
Read a lesson, look at examples, and try easy, medium, and advanced problems from a variety of trigonometry topics: radian measure of angles, trigonometric functions, trigonometric identities, and modeling with trigonometric functions.
CK-12 Foundation
Ck 12: Precalculus Concepts 2.0
A complete high school Precalculus Concepts course. Includes 'Related Modalities' for each lesson that teach the same concept in different ways. The text materials follows Algebra II and comes before Calculus or Statistics. The content...
CK-12 Foundation
Ck 12: Trigonometry: Inverse Trigonometric Functions
[Free Registration/Login may be required to access all resource tools.] This lesson covers the inverses of all six trig functions.
Texas Instruments
Texas Instruments: Computing by Degrees!
In this activity, students use the calculator to solve trigonometry problems using sine, cosine, and tangent. They also find inverses of trigonometric functions.
CK-12 Foundation
Ck 12: Trigonometry: Proofs of Trigonometric Identities
[Free Registration/Login may be required to access all resource tools.] This lesson uses trigonometric identities to prove other identities.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Razones Trigonometricas De Algunos Angulos
In Spanish. Observe the relationships between the trigonometric functions then test your knowledge with the activities at the end.
CK-12 Foundation
Ck 12: Trigonometry: Secant, Cosecant, and Cotangent Functions
[Free Registration/Login may be required to access all resource tools.] This lesson covers secant, cosecant, and cotangent.
CK-12 Foundation
Ck 12: Trigonometry: Sine, Cosine, and Tangent Functions
[Free Registration/Login may be required to access all resource tools.] This lesson covers the three trigonometric ratios: sine, cosine, and tangent.
CK-12 Foundation
Ck 12: Trigonometry: Triple Angle Formulas and Linear Combinations
[Free Registration/Login may be required to access all resource tools.] Advanced applications of trigonometric identities.
CK-12 Foundation
Ck 12: Trigonometry: Cosine and Secant Graphs
[Free Registration/Login may be required to access all resource tools.] Define the cosine and secant graphs using a unit circle.
CK-12 Foundation
Ck 12: Trigonometry: Law of Cosines
[Free Registration/Login may be required to access all resource tools.] Use Law of Cosines and Law of Sines in different triangle situations.
Khan Academy
Khan Academy: Solving for a Side in Right Triangles With Trigonometry
Learn how to use trig functions to find an unknown side length in a right triangle.
Other
Karl's Calculus Tutor: Trigonometric Functions
Great application of trig and introduction to the trig functions. Also found here are the Law of Sines and Law of Cosines as well as other trig topics to review.
CK-12 Foundation
Ck 12: Trigonometry Word Problems
[Free Registration/Login Required] Students will determine the angle of depression using a diagram with a helicopter. Click learn more to watch a video and click challenge me to answer a practice question.
Interactive Mathematics
Interactive Mathematics: Derivatives of Inverse Trig Functions
The formulas for working with the derivatives of inverse trigonometry functions (arccos, arcsin, etc.) are presented here, along with several examples of how to find such derivatives. The exercises allow you to work the problems before...
Math Medics
S.o.s. Math: Math Review Resources
A math tutorial for many areas of math that contains over 2,500 pages of explanations and examples in algebra, trigonometry, calculus, and basic mathematics. Also has exams and ask-an-expert function.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Trig Tour
Take a tour of trigonometry using degrees or radians! Look for patterns in the values and on the graph when you change the value of theta. Compare the graphs of sine, cosine, and tangent.
TeachEngineering
Teach Engineering: Python Script Analysis
Working in small groups, students complete and run functioning Python codes.This requires students to understand the logic employed, and then they must make modifications to the code in order to find the slopes of tangents to a variety...
Math Open Reference
Math Open Reference: Math / Scientific Calculator
This online scientific/math calculator supports functions for algebra and trigonometry. Operates using both the keys on the computer keyboard or pressing the keys on the calculator with the mouse or a combination of both.
University of Vienna (Austria)
University of Vienna: Trig Functions With Absolute Value Differentiable or Not?
Given eight trigonometric functions containing absolute value elements, choose whether each is differentiable or non-differentiable. At the conclusion of the exercises, the site returns a score which helps judge understanding of the topic.
Interactive Mathematics
Interactive Mathematics: Integration by Trig Substitution
Having trouble integrating those tough functions? Try using Trigonometric Substitution. This lesson demonstrates the process and allows for you to practice using the examples provided.
Paul Dawkins
Paul's Online Notes: Trig Cheat Sheet [Pdf]
A trigonometry "cheat sheet" to use as a reference when completing trigonometry homework. Lists basic facts, properties, identities, formulas, and inverse trigonometric functions.
Mr. Martini's Classroom
Mr. Martini's Classroom: Right Angle Trigonometry
Explore sine, cosine, and tangents compared to the selected angle.