### 5.1- How to use pythagorean identities to simplify trig identities - Cool Math

http://www.freemathvideos.com In this video tutorial I will show you how to solve trigonometric equations. We will explore solving trigonometric equations in the same manner that we learned to solve algebraic equations. First we need to simplify our equation by combining like terms and moving all of our trigonometric terms to the same side. We then can either look to using inverse operations to isolate a single trigonometric property or apply factoring and the zero product property so set up two equations we can solve. Our solution set will either be on the interval of [0,2pi) or follow all real solutions. Our answers will vary depending on the instructions. This math problem was filmed during online live instruction for class. This is my way of providing a free tutorial for students that want to learn math from an online tutor. Please visit my website listed above where you can view all of my math lessons. Every video is a short clip that shows exactly how to solve math problems step by step. The problems are done in real time and in front of a live classroom. These videos are intended to help you learn how to solve math problems, review how to solve math problems, study for a test, finish your homework and get a better grade in your math class. Please write to me and let me know how I can better help you! http://www.freemathvideos.com In this video series I will show you how to simplify trigonometric expressions. We will simplify these expression to either a single trigonometric term or number. To simplify we will use trigonometric identities such as Pythagorean, reciprocal, quotient, even odd, and co-function. We will also use algebraic rules to help us simplify the expression such as combining like terms, distributive property, multiplicative, additive inverses, and factoring.

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