For the scalar function T=e^(-r/5)cos phi, determine its directional derivative along the radial direction hat(r) and then evaluate it at P(2, pi/4.3)

Ethen Blackwell 2022-07-25 Answered
For the scalar function T = e r / 5 cos ϕ , determine its directional derivative along the radial direction r ^ and then evaluate it at P ( 2 , π / 4.3 ).
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Answers (1)

Rihanna Robles
Answered 2022-07-26 Author has 18 answers
( e r 5 cos ( ϕ ) ) = ( e r 5 cos ( ϕ ) e r 5 sin ( ϕ ) r 0 ). Evaluated at P ( 2 , π / 4 , 3 ) = ( 1 / 5 , 1 / 2. 0 ) 1 / ( 2 e 2 5 )
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