Question

Let F = ( 14 cos Cany) + * (xcoy Guy) - 4)] el p asse is gradient vector field b) if it is find the potential function f.

Evaluak Whace casc cis a line segment from (Ji, 1) to (1J). d) Evaluate de Whre L is an ellipse orienld counterdockwise

Example

292000 Ex, F = (byny -* $T +(x+4) ou if F is SR adizent volor field, b) if it is find the potential function of Write a solve

f(x ) = c) above x-anis Evaluale J where c is a sencinte x + y = 4 Oricted free (2,o) to (-2,0). Use FTCLI: d) Evalua (1) Po

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Answer #1

f = (gos (x4)+ l)i + (x cos (KY) -1)] NOK Noua dle = a (x costes en (2605(wy) - 1) a los(x4) - xy Sm(x4) boy ( y cos (24) +1)from li) gut bily) = -1 h(y)= aY+C If (x. 9) = sin(ay) + x -Y+C) a potential function Now use fundamental theorem af live joudist von tiate ea in Wirtoy e - ? t n lys from (ii) n(y)= y nly) = y el y2 Now TC f(-2,0) – +(2,0) (t.dr. 6 -o-1 – oth = 0 –

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