Unit Plan
Khan Academy

Khan Academy: Period of Sinusoidal Functions From Graph

For Students 9th - 10th Standards
Given the graph of a sinusoidal function, determine its period. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Midline of Sinusoidal Functions From Graph

For Students 9th - 10th
Given the graph of a sinusoidal function, determine its midline equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Other

Gcse Answers' Easy Start Trigonometry

For Students 9th - 10th
Some basic questions dealing with everyday situations where trigonometry is needed to solve the problem. Click a button for the solutions.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F tf.a, F bf.b.3 Exploring Sinusoidal Functions

For Teachers 9th - 10th Standards
In this task, students explore the effect that changing the parameters in a sinusoidal function has on the graph of the function. Aligns with F-TF.A and F-BF.B.3.
Activity
University of St. Andrews (UK)

University of St. Andrews: Trigonometric Functions

For Students 9th - 10th Standards
This site from the University of Saint Andrews provides an historical look at the origins of trig functions. This site ties together mathematics and history from Hipparchus to Ptolemy to Lambert.
Handout
University of St. Andrews (UK)

University of St. Andrews: Albert Girard

For Students 9th - 10th
In trigonometry today, we use the abbreviations sin, cosine and tan. Girard was the first mathematician to use these abbreviations in his work.
Unit Plan
Khan Academy

Khan Academy: Midline of Sinusoidal Functions From Equation

For Students 9th - 10th
Given the formula of a sinusoidal function, determine its midline equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Graph Sinusoidal Functions

For Students 9th - 10th Standards
Given the formula of a sinusoidal function of the form a*f(bx)+d, draw its graph. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unknown Type
Khan Academy

Khan Academy: Algebra Ii: Modeling With Sinusoidal Functions

For Students 9th - 10th Standards
Given the description of a real-world relationship, find the sinusoidal function that models it. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Algebra Ii: Construct Sinusoidal Functions

For Students 9th - 10th Standards
Given a few features of a sinusoidal function, find its formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
Purple Math

Purplemath: Special Angle Values: 30 60 90 and 45 45 90 Triangles

For Students 9th - 10th
Explains a simple pictorial way to remember basic reference angle values. Provides other memory aids for the values of trigonometric ratios for these "special" angle values, based on 30-60-90 triangles and 45-45-90 triangles.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Angle Side Angle Triangles

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Find the unknown side of a triangle when two angles and the included side are known.
Lesson Plan
Khan Academy

Khan Academy: Start Here! Ready to Dive Into Some More Math?

For Students 9th - 10th
This is an overview of the lesson: Students are going to derive a powerful formula which will calculate where any point (x,y) (x, y) (x,y)left parenthesis, x, comma, y, right parenthesis goes afterrotation by an angle theta theta about...
Handout
Math Open Reference

Math Open Reference: Trigonometry Functions Introduction

For Students 9th - 10th Standards
A complete reference guide to trigonometry functions. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
Purple Math

Purplemath: Quadrants and Angles

For Students 6th - 8th Standards
Explains how to model angles in the x,y-plane, and demonstrates how to extend the concept of trig ratios to angles larger than 90 degrees.
Handout
Purple Math

Purplemath: Trigonometric Identities

For Students 9th - 10th Standards
Lists the basic trigonometric identities, and specifies the set of trig identities to keep track of, as being the most useful ones for calculus.
Handout
Purple Math

Purplemath: The Unit Circle

For Students 9th - 10th Standards
Relates the unit circle to the method for finding trig ratios in any of the four quadrants. Demonstrates how the unit circle might be useful.
Activity
University of Maryland

Thinking Problems in Oscillations and Waves

For Students 9th - 10th
A series of thought-provoking, multichoice questions from the University of Maryland on the topic of oscillations and waves. Equations for calculating the period of motion for masses on springs, pendulums, sounds, and waves on a string...
Unit Plan
University of California

University of California, Davis:trig Derivatives

For Students 9th - 10th
Use this site from the University of California, Davis to practice taking derivatives of trigonometric functions. The site begins with a list of the derivatives of each of the trig functions and then offers related problems with solutions.
Activity
Exploratorium

Exploratorium: Cross Reference: Harmonic Motion

For Students 9th - 10th
A page which cross-references various museum exhibits pertaining to harmonic motion. Page also contains an animation depicting the sinusoidal nature of simple harmonic motion.
Website
Other

Inverse Trigonometric Functions [Pdf]

For Students 9th - 10th Standards
This is a ten page selection from a math textbook that highlights the concept of inverse trigonometric functions. The book provides real world examples, worked out practice problems and numerous problems for students to attempt on their...
Activity
Interactive Mathematics

Interactive Mathematics: Vital Revision for Fourier Series

For Students 9th - 10th
Begin your studies of the Fourier Series with this lesson. It contains information on all of the essentials of getting started, including trigonometric functions, continuity, periodic functions, and more.
Activity
Interactive Mathematics

Interactive Mathematics: Applying Trigonometric Derivatives

For Students 9th - 10th
The applications presented here demonstrate how the derivatives of trigonometric functions are used in real world problems.
Handout
Other

University of Winnipeg: The Simple Pendulum

For Students 9th - 10th
The periodic motion of a pendulum is described with words and equations; little conceptual emphasis. Sample problems with solutions are provided.

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