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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.
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Unit Plan
Khan Academy

Khan Academy: Intro to Inverse Trig Functions

For Students 9th - 10th Standards
Learn about arcsine, arccosine, and arctangent, and how they can be used to solve for a missing angle in right triangles.
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Activity
Math Is Fun

Math Is Fun: Trigonometry

For Students 9th - 10th Standards
Students explore trigonometry concepts through this collection of definitions, lessons, examples problem-solving steps and strategies, and practice problems. Topics include solving triangles, trigonometric functions, theorems, and the...
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Amplitude, Period, and Frequency

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Combine calculations for amplitude and period on a sine or cosine graph.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Amplitude

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Find the amplitude of a sine or cosine curve.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Period and Frequency

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Relating period and frequency for a sine or cosine graph with examples, practice problems, and vocabulary.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Secant, Cosecant, and Cotangent Functions

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers secant, cosecant, and cotangent.
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Activity
Math Is Fun

Math Is Fun: Trigonometric Identities

For Students 9th - 10th Standards
A good introduction to trigonometric identities, equations that are always true for a right triangle and require knowledge of the functions sine, cosine, and tangent.
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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.
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Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Razones Trigonometricas De Algunos Angulos

For Students 10th - 12th Standards
In Spanish. Observe the relationships between the trigonometric functions then test your knowledge with the activities at the end.
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Unknown Type
That Quiz

That Quiz: Trigonometry

For Students 9th - 10th Standards
You can practice evaluating the six trigonometric functions and their inverse in radians or degrees. Four different levels are provided and it also tracks the number of correct answer.
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Activity
Other

Technical Tutoring: The Very Fast Trig Review

For Students 9th - 10th Standards
This resource is a quick review of the functions and identities in trigonometry.
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Website
Other

Dan Sloughter: Trigonometric Series Approximations

For Teachers 9th - 10th
Understand how trigonometric functions can model periodic behavior. See the application of periodic behavior, amplitude, frequency in sound waves. Make sure to turn up your sound to load an audio file to play the given tone of the...
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Activity
Interactive Mathematics

Interactive Mathematics: Derivatives Sin, Cos, & Tan Function

For Students 9th - 10th
Several formulas are given for taking the derivatives of trigonometry functions. Several examples are presented to demonstrate the process of finding these derivatives. The examples allow the user to practice before seeing the solution.
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Activity
Interactive Mathematics

Interactive Mathematics: Derivatives of Inverse Trig Functions

For Students 9th - 10th
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...
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Activity
Interactive Mathematics

Interactive Mathematics: Derivatives of Csc, Sec, and Cot Functions

For Students 9th - 10th
The derivatives for cosecant, secant, and cotangent functions are presented here. Several examples allow the user to practice finding the derivatives before seeing the solutions.
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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.
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Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Trigonometric Ratios

For Students 9th - 10th Standards
Find a quick, concise explanation of the trigonometric ratios: sine, cosine and tangent. Examples are given and clearly explained.
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Interactive
Walter Fendt

Walter Fendt: First and Second Derivative of a Function

For Students 9th - 10th
A short interactive activity to visualize the first and second derivative of a function of your choice.
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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....
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Unit Plan
Clark University

Clark University: Dave's Short Trig Course

For Students 9th - 10th
This Clark University trigonometry tutorial site features questions and answers about what students can learn from trigonometry.
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Activity
Other

Karl's Calculus Tutor: Derivative of Inv. Trig Functions

For Students 9th - 10th Standards
This site provides a general overview of the derivative of inverse trig trunctions. Content includes a proof, exercises, and more.
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Handout
Wikimedia

Wikipedia: Trigonometric Function

For Students 9th - 10th
This page from Wikipedia, a free and open-source encyclopedia, covers how to solve a variety of trigonometric equations, most of which involve substitution with a trigonometric identity. The identities themselves are not covered, but...
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Handout
Analyze Math

Analyze Math: Domain and Range of Basic Functions

For Students 9th - 10th Standards
Learners examine a table of domain and range for basic functions. The tutorial includes the domain and range of algebraic, trigonometric, inverse trigonometric, hyperbolic, and logarithmic functions.