eBook
Math Planet

Math Planet: Algebra 2: Cosines

For Students 9th - 10th Standards
Defines and explores the law of cosines through examples and a video lesson. [1:41]
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inverse Trigonometric Ratios

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to use inverse trigonometric ratios to solve for missing angles in right triangles.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inverse Trigonometric Ratios

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Use the inverse trigonometric ratios.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Sine, Cosine, Tangent

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find the sine, cosine, and tangent of right triangles.
Handout
Johan Claeys

Math Abundance: Inverse Trigonometric Functions = Cyclometric Functions

For Students 9th - 10th Standards
Explains the inverse trigonometric functions using examples.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Sine, Cosine, Tangent

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Find the sine, cosine, and tangent of right triangles.
Website
Cool Math

Coolmath: Solving Trig Equations

For Students 9th - 10th
This CoolMath resource explains how to solve trigonometric equations
Unknown Type
Windstream

Ojk's Precalculus Study Page: Trigonometry Sample Test

For Teachers 9th - 10th Standards
A practice test that covers proving trigonometric identities and solving advances trigonometric equations.
Whiteboard
ClassFlow

Class Flow: Trigonometry

For Teachers 9th - 10th Standards
[Free Registration/Login Required] Students explore trigonometric functions using the interactive features of Activstudio. Students apply their understanding of trigonometric sense to determine the side lengths and angles of various...
Activity
Free Math Help

Free Math Help: Trigonometry Derivatives

For Students 9th - 10th Standards
The tutorial examines trigonometric derivatives. Formulas, graphs, and an example are included.
Activity
Massachusetts Institute of Technology

Mit: Useful Trigonometric Identities

For Students 9th - 10th
This list of trigonometric identities includes the factoring formulas near the bottom. A great tool for reference.
Activity
University of Saskatchewan (Canada)

University of Saskatchewan: Trigonometric Identities

For Students 9th - 10th Standards
The University of Saskatchewan provides an explanation of trigonometric identities, including the reciprocal identities, the addition and subtraction formulas with sine and cosine, and the double angle formulas. There are links to...
Activity
Harvey Mudd College

Hmc Mathematics Online: Tutorial: Review of Various Functions

For Students 9th - 10th Standards
This site explains the functions such as trigonometric, exponential, and logarithmic
Activity
Windstream

Ojk World of Math: Relationships Between the Functions

For Students 9th - 10th Standards
This tutorial discusses relationships among all the trig identities. Examples are given on how to apply them to simplify trig expressions and prove identities.
Website
Wolfram Research

Wolfram Math World: Geometry

For Students 9th - 10th
This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...
Activity
University of Vienna (Austria)

University of Vienna: Trig Functions With Absolute Value Differentiable or Not?

For Students 9th - 10th
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.
Activity
University of Vienna (Austria)

Univ of Vienna: Trigonometric Functions

For Students 9th - 10th
An interactive tool to discover how the trig functions came to be. Applets are used in this interactive learning tool. Examples exercises are also given.
Activity
Math Medics

S.o.s. Math: Measure of an Angle

For Students 9th - 10th Standards
This lesson gives a tutorial on the measure of an angle. Includes sample problems and solutions.
Interactive
Other

Answermath.com: Coseno

For Students 9th - 10th
An online cosine game which offers practice in mental math and times practice. When you submit the wrong answer, it provides the correct one. In Spanish, with links to English and Italian versions.
Lesson Plan
Other

Ontario Ministry of Education: Grade11 Gsp Sketches

For Teachers 9th - 10th
A selection of Grade 11 sketches for use with The Geometer's Sketchpad can be downloaded here. The files are in GSP format.
Activity
Ministerio de Educacion, Cultura y Deporte (Spain)

Cnice: Relacion De Ejercicios Interactivos.

For Students 9th - 10th
In Spanish. Interactive activities online on various geometric and trigonometric concepts such as area, perimeter, secants, tangents, etc. A terrific resource for students. Site is organized acoording to shape. (triangle, quadrilaterals,...
Graphic
National Council of Teachers of Mathematics

The Math Forum: Vectors and Points

For Students 9th - 10th Standards
Definition and description of vectors. Diagram included. This site only covers the most basic aspects of vectors.
Interactive
Government of Alberta

Learn Alberta: Exploring Similarity and Congruence

For Students 6th - 8th Standards
Begin by watching this captivating video showing how the concepts of similarity and congruence are found in road signs. Following the video [1:27], an interactive applet allows students to resize, flip, move and rotate triangles to...
Activity
TeachEngineering

Teach Engineering: Trig River

For Teachers 6th - 8th
Students learn about and use a right triangle to determine the width of a "pretend" river. Working in teams, they estimate of the width of the river, measure it and compare their results with classmates.

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