This calculus 3 video explains how to find local extreme values such as local maxima and local minima as well as how to identify any critical points and saddle points in a multivariable function such as f(x,y). Lines & Planes - Intersection: https://www.youtube.com/watch?v=_W3aVWsMp14 Angle Between Two Planes: https://www.youtube.com/watch?v=7G07dPSlWbY Distance Between Point and Plane: https://www.youtube.com/watch?v=zWMTTRJ0l4w Chain Rule - Partial Derivatives: https://www.youtube.com/watch?v=XipB_uEexF0 Implicit Partial Differentiation: https://www.youtube.com/watch?v=OBELQIPH5xY ________________________________ Directional Derivatives: https://www.youtube.com/watch?v=CnVes9TdnPo Limits of Multivariable Functions: https://www.youtube.com/watch?v=E1lMMBpz8YM Double Integrals: https://www.youtube.com/watch?v=BJ_0FURo9RE Local Extrema & Critical Points: https://www.youtube.com/watch?v=UID893EosM8 Absolute Extrema - Max & Min: https://www.youtube.com/watch?v=Hg38kfK5w4E ________________________________ Lagrange Multipliers: https://www.youtube.com/watch?v=5-CUqogfPLY Triple Integrals: https://www.youtube.com/watch?v=7iy83x8bv6o 2nd Order - Differential Equations: https://www.youtube.com/watch?v=uI2xt8nTOlQ Undetermined Coefficients: https://www.youtube.com/watch?v=P3fc6v191mA Variation of Parameters: https://www.youtube.com/watch?v=Ik3YW1JGr_A ________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections