how to differentiate v(t) = 9.2 when t = 20 in matlab

To differentiate v(t) = 9.2 with respect to t and evaluate it at t = 20 in matlab, you can follow these steps:

1. Define v(t) as a symbolic function using syms.
2. Find the derivative of v(t) with respect to t using the diff function.
3. Evaluate the derivative at t = 20 using subs.

Here is the code snippet that performs these steps:

main.m
syms t                    % step 1: define t as symbolic variable
v = 9.2;                  % define v as a constant
dvdt = diff(v,t);         % step 2: differentiate v with respect to t
v20 = subs(dvdt, t, 20);  % step 3: evaluate dv/dt at t = 20
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The output of v20 should be 0, since v is a constant and its derivative with respect to t is zero.