#### Example 2: solve a trig equation using a double angle identity

This tutorial provides an example of solving a trig equation that requires the use of a double angle identity.

This tutorial provides an example of solving a trig equation that requires the use of a double angle identity.

This tutorial provides an example of solving a trig equation that requires the use of a double angle identity.

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**FREE**

Video tutorial on Using Double Angle Identities to Solve Equations, Example 1.
In this video, I use some double angle identities for sine and/or cosine to solve some equations.

By PatrickJMT

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**FREE**

Exercise solving trig equations with double angle identity.

By IBVodcasting

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**FREE**

This video provides three examples of simplifying and evaluating a trigonometric expression using a double angle identity.

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**FREE**

This video explains how to compare the mean and standard deviation of two groups of data.

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**FREE**

This lesson explains how to find the probability to two independent events.

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**FREE**

Video tutorial on how to apply Dijkstra's algorithm to find the shortest path from one vertex to another using a graph

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**FREE**

This video explains how to determine the height of a building given an angle of elevation and angle of depression using right triangle trigonometry.

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**FREE**

Trigonometry: Introduction to Trigonometry Bundle is a ready-to-use set of notes, activities and projects for introductory study of trigonometry. Topics include trigonometric functions including co-functions, law of sine and law of cosine, and angles of elevation and depression. Save more than 25%!
This purchase is for one teacher only. This resource is not to be shared with colleagues or used by an entire grade level, school, or district without purchasing the proper number of licenses. If you are interested in a site license, please contact me for a quote at docrunning@kulikuli.net. This resource may not be uploaded to the internet in any form, including classroom/personal websites or network drives.

By docrunning

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**$35.00**

Law of Cosines: Coded Message for Practice and Review is a fun way to practice law of cosines. Students use the law of cosines to find measures of angles and lengths of sides to finish a code of letters and then use the code to find a message. Two different messages and codes are included in this set.
A great addition to your study of trigonometry. Great to use after Law of Cosines: Notes and Practice.
NOTE: There are not problems for all 26 letters. Each decode page contains 12 practice problems.
This purchase is for one teacher only. This resource is not to be shared with colleagues or used by an entire grade level, school, or district without purchasing the proper number of licenses. If you are interested in a site license, please contact me for a quote at docrunning@kulikuli.net. This resource may not be uploaded to the internet in any form, including classroom/personal websites or network drives.

By docrunning

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**$3.50**

A super package of C3 / C4 revision files with thousands of questions. Includes trigonometric relations, vectors, integrals (how do you work them out?) and mixed questions with extra topics, at a discounted price!

By JChamboredon

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**$5.95**

This is a powerpoint covering all areas of Core 2. It contains brief notes by way of an explanation, model answers to questions and a question or two for the students to do; all of the questions come with answers that you can display when ready. The slide show comes with a progress grid (regularly referred to in the presentation) so that students can mark their progress from start to finish and pinpoint any areas that may need extra work with a “red/amber/green” system that they fill in. It’s what I use in my lessons before setting tasks from worksheets or text books to practice. If there are any silly errors then let me know so I can correct them but I have been through the entire presentation with students who are keen to point out mistakes!

By alutwyche

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**$6.61**