M 427L Lecture Notes - Lecture 10: Unit Vector
17 Mar 2020
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Fromlasttime f x y w x xct y yet. Extension f x yet _w x xct y yet. Find doff i t t for w ln 1 442122 y cost 2 tant cost t 21 c sint where xesint. 9 9cris z 2 vis t rt t. Is a alum b bluev for w x2txy7z3. Zzz r t 3rs rats2 2 zs t 3 ifrs chain rule forquiz. Section directional derivatives 1 diagonal weknow how change in the. Slope of tan line direction in x and y but whatabout diagonal. Definition the directional derivative of a at a point in the direction of unit vector. Example find the directional derivative of in the direction of 8 35 4j. 0 first step always make j unit vector nine it c"s. If we clot all of the gradient vectors we create gradientfield as little. Tf e then in the direction tflpo f increases fastest fastest in direction ftp.
