Verifying Trigonometric Identities - Part I
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Video Lecture 25 of 55
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### Lecture Description

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. youtu.be/TCdhf9iVkYcVerifying Trigonometric Identities Part 2 www.youtube.com/watch?v=q8k-sS7qRts Verifying Trigonometric Identities Part 3 www.youtube.com/watch?v=mAnw4ImaPK0

### Course Description

In this series, the very helpful and fun math teacher Mr. Tarrou teaches students an entire course on trigonometry from start to finish, and on top of that, provides a comprehensive and easy to understand introduction to polar coordinates, vectors, and complex numbers. His videos are friendly, easy to understand, entertaining, and very well organized, all thanks to Mr. Tarrou great dedication to teaching and enthusiasm for mathematics.