This calculus video tutorial explains how to find the derivative of sine and cosine functions. it explains why the derivative of sine is cosine using the limit definition of the derivative. Derivatives - Fast Review: https://www.youtube.com/watch?v=5yfh5cf4-0w Limit Definition of the Derivative: https://www.youtube.com/watch?v=-aTLjoDT1GQ Derivatives - Alternate Limit Definition: https://www.youtube.com/watch?v=6yzaEpacZkg Derivatives - The Constant Rule: https://www.youtube.com/watch?v=cyn6CDnAlcA Derivatives - The Power Rule: https://www.youtube.com/watch?v=9Yz-RCdS2Tg _________________________________ Derivatives - Constant Multiple Rule: https://www.youtube.com/watch?v=ut-AFj600S0 Derivatives - Polynomial Functions: https://www.youtube.com/watch?v=8Sv6CNuNwqo Derivatives - Sine and Cosine: https://www.youtube.com/watch?v=QYJx-ztCrE4 Derivatives - Trigonometric Functions: https://www.youtube.com/watch?v=PEqCa0U77mc Derivatives - Limits: https://www.youtube.com/watch?v=xGibYZiT5-U _______________________________________ 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 _______________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections