How to Find The Point Where The Graph has a Horizontal Tangent Lines Using Derivatives

This calculus video tutorial explains how to find the point where the graph has a horizontal tangent line using derivatives. This video contains a few examples and practice problems. Derivatives - Fast Review: https://www.youtube.com/watch?v=5yfh5cf4-0w&t=1s Equation of the Tangent Line: https://www.youtube.com/watch?v=5NyeGzbBJQM Derivatives - Horizontal Tangent Line: https://www.youtube.com/watch?v=aNfoxbMUOHk The Equation of The Normal Line: https://www.youtube.com/watch?v=lEF2mmR3CWU The Equation of The Secant Line: https://www.youtube.com/watch?v=680o1GL-LRg _________________________________ Average and Instantaneous Velocity: https://www.youtube.com/watch?v=AwxT1xjMP9g Instantaneous Rate of Change: https://www.youtube.com/watch?v=dvQdQLTnDpk Derivatives of Rational Functions: https://www.youtube.com/watch?v=qknoFdPwEco Derivatives of Radical Functions: https://www.youtube.com/watch?v=B1YkgNDbx5o Derivatives of Fractions: https://www.youtube.com/watch?v=qrBkQ8Ci2fM ________________________________ Derivatives - Higher Order: https://www.youtube.com/watch?v=s7rd9YPJrNc Simplifying Derivatives: https://www.youtube.com/watch?v=3lUOtjkqfQo Derivatives - The Product Rule: https://www.youtube.com/watch?v=17X5g9QArTc Derivatives - The Quotient Rule: https://www.youtube.com/watch?v=8jVDEcQ0wXk Derivatives - The Chain Rule: https://www.youtube.com/watch?v=HaHsqDjWMLU _______________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections