How to define second derivative in symbolic

192 visualizzazioni (ultimi 30 giorni)
AA, I have a project to derive some equations that defined in symbolic variables. For example, r= cos(A), I want the symbolic system show me a result that dr/dA = -sin(A)*(dA/d) as A has derivatives values dA/d and so far for d²A/d² If I want the second derivative of r.

Risposta accettata

Star Strider
Star Strider il 7 Apr 2022
Use the symbolic diff function —
syms A
r(A) = cos(A)
r(A) = 
D1r = diff(r)
D1r(A) = 
D2r = diff(r,2)
D2r(A) = 
.
  6 Commenti

Accedi per commentare.

Più risposte (1)

Mohammed Hamaidi
Mohammed Hamaidi il 7 Apr 2022
dr/dA = -sin(A)*(dA/d)
d²r/dA² = -cos(A)*(dA/d)^2-sin(A)*d²A/d²
  3 Commenti
Anas Zh
Anas Zh il 7 Apr 2022
Any variable, it doesn't matter

Accedi per commentare.

Tag

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by