# Interactive video lesson plan for: Verifying Trigonometric Identities Pt 1

#### Activity overview:

Using the fundemental identities and the Pythagorean Identities, I go over multiple examples of verifying trigonometric identities.

It is very important in proofs that you do not handle it like an equation moving terms and factors from side to side.

I was corrected that what I am trying to prove should not be within the body of the proof. This implies it has already been assumed to be true. So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof:
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
=cos^2(x)(1/cos^2(x))
=1
I reshot the intro with permanent corrections instead of just the annotations that are at the beginning of this video. http://youtu.be/TCdhf9iVkYc

Verifying Trigonometric Identities Part 2
https://www.youtube.com/watch?v=q8k-sS7qRts
Verifying Trigonometric Identities Part 3
https://www.youtube.com/watch?v=mAnw4ImaPK0

Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com

Tagged under: prove,proof,proofs,verify,verifying,trig,trigonometric,identity,identities,pythagorian,fundemental,examples,tarrou,tarrou',profrobbob,chalk,talk,precalculus,trigonometry,Proofs Of Trigonometric Identities

Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.

Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip

Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans

Play this activity

1. Students enter a simple code

2. You play the video

3. The students comment

4. You review and reflect

* Whiteboard required for teacher-paced activities

## Ready to see what elsecan do?

With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.

Quickfire

Carry out a quickfire formative assessment to see what the whole class is thinking

Discuss

Create interactive presentations to spark creativity in class

Team Up

Student teams can create and share collaborative presentations from linked devices

Clip

Turn any public video into a live chat with questions and quizzes

### 1000s of teachers use Spiral to deliver awesome, engaging activities that capture students' understanding during lessons.

Now it's your turn Sign up

### Spiral Reviews by Teachers and Digital Learning Coaches

@kklaster

Tried out the canvas response option on @SpiralEducation & it's so awesome! Add text or drawings AND annotate an image! #R10tech

@3rdgradeBCE

Using @SpiralEducation in class for math review. Student approved! Thumbs up! Thanks.

@ordmiss

Absolutely amazing collaboration from year 10 today. 100% engagement and constant smiles from all #lovetsla #spiral

@strykerstennis

Students show better Interpersonal Writing skills than Speaking via @SpiralEducation Great #data #langchat folks!

@iladylayla

A good tool for supporting active #learning.

@BrettErenberg

The Team Up app is unlike anything I have ever seen. You left NOTHING out! So impressed!

## Get the Clip Chrome Extension & Create Video Lessons in Seconds

Add Clip to Chrome