Worksheet
Curated OER

PreCalculus: Final Examination

For Students 10th - 12th
In this final examination worksheet, students find the tangent function and sine function.  They graph problems on a polar coordinate.  Students describe trigonometric properties.  This twelve-page worksheet contains 80...
Worksheet
Curated OER

Worksheet 20

For Students 11th - Higher Ed
In this math worksheet, students investigate the given vectors. Then they apply the knowledge to prove the formula for the triangle formed by them.
Worksheet
Curated OER

Precalculus Exam

For Students 11th - 12th
In this precalc lesson, learners write out definitions, identify functions, solve integrals and derivatives and graph trig functions as they relate to angles. This is a final exam for precalculus. There are 80 questions on this exam.
Worksheet
Curated OER

Solving Trigonometry Problems in Two and Three Dimensions

For Students 11th - 12th
In this Pre-calculus/Trigonometry worksheet, students solve trigonometry problems in two and three dimensions. The eleven page worksheet contains explanation, examples, and twenty problems. Answers are not included.
Lesson Plan
Curated OER

Trigonometric Transformations

For Teachers 10th - 11th
Students perform transformation on trig functions. In this precalculus lesson, students relate the London Eye observation wheel to trig function. They use a TI navigator to visualise the parameter created by this view and relate it to...
Unit Plan
Oswego City School District

Regents Exam Prep Center: Law of Sines and Law of Cosines

For Students 9th - 10th Standards
This tutorial examines the law of sines and the law of cosines. Includes class notes, examples, and a variety of practice problems with solutions. The teacher resource consists of a lab that utilizes the law of sines and the law of cosines.
Unit Plan
Cuemath

Cuemath: Law of Cosine

For Students 9th - 10th Standards
Explore the world of the Law of Cosine in this mini-lesson. Provides a definition, simulations, examples, and practice questions that help with understanding.
Unknown Type
Khan Academy

Khan Academy: Solve Triangles Using the Law of Cosines

For Students 9th - 10th Standards
Solve missing triangle measures using the law of cosines. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
CK-12 Foundation

Ck 12: Determination of Unknown Angles Using Law of Cosines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Find an unknown angle of a side side side triangle using the Law of Cosines.
Unit Plan
Lawrence Hall of Science

The Math Page: Trigonometry: The Law of Cosines

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains the law of cosines and how to use it. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who...
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 7.7 Law of Cosines

For Students 9th - 10th Standards
Learn how the Law of Cosines uses the measure of angle C to provide an equation that relates the three sides of the triangle with angle C.
Handout
Math Is Fun

Math Is Fun: The Law of Cosines

For Students 9th - 10th Standards
Students learn about the law of cosines. The tutorial consists of a definition, examples, and practice problems to check for comprehension.
Handout
Wolfram Research

Wolfram Math World: Law of Cosines

For Students 9th - 10th Standards
This page from MathWorld.com gives a good explanation of the Law of Cosines, which relates the lengths of the legs of a triangle to the angles. This site shows how the formula is derived, along with a triangle to clarify variables. Also...
Handout
Math Open Reference

Math Open Reference: Law of Cosines

For Students 9th - 10th Standards
Learn about the Law of Cosines with this resource which offers detailed explanations, examples, and an interactive. Links to related topics.
Handout
Wolfram Research

Wolfram Math World: Law of Sines

For Students 9th - 10th Standards
This MathWorld page gives a good explanation of the Law of Sines, which relates the lengths of the sides of a triangle to the sines of the opposite angles. This site gives a picture to help clarify the variables used in the equation....
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Law of Cosines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Use Law of Cosines and Law of Sines in different triangle situations.
Unit Plan
CK-12 Foundation

Ck 12: Determination of Unknown Angles Using Law of Cosines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers using the Law of Cosines to find an angle in a triangle.
Interactive
Calculator Soup

Calculator Soup: Law of Cosines Calculator

For Students 9th - 10th Standards
Use the law of cosines to calculate unknown angles or sides of a triangle. In order to calculate the unknown values, you must enter 3 known values.
Activity
Cut the Knot

Cut the Knot!: The Law of Cosines (Cosine Rule)

For Students 9th - 10th Standards
This site from Cut The Knot provides an overview of the law of cosines, complete with an explanation of the law and a proof of the law.
Activity
Georgia State University

Georgia State University: Hyper Physics: Law of Cosines

For Students 9th - 10th Standards
This page from the Georgia State University provides a definition of the Law of Cosines. Also includes a "calculator" to help you find side lengths and opposite angles when you are given either three sides or two sides and a third angle.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Law of Sines and Law of Cosines

For Students 9th - 10th Standards
Sixteen problems present practice working with the Law of Sines and Law of Cosines. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution"...
Unknown Type
McGraw Hill

Glencoe Mathematics: Online Study Tools: Self Check Quiz on Law of Cosines

For Students 9th - 10th Standards
The online assessment demonstrates knowledge of Algebra II. The questions test students on the law of cosines.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Laws of Sines and Cosines

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find missing sides and angles in non-right triangles using the Laws of Sines and Cosines.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Sides of an Oblique Triangle

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers using the Law of Cosines to find the third side of a triangle.

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