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Cannot find the derivative of a function in terms of time

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Spulber Alexandru
Spulber Alexandru 2022-12-24
评论： Sulaymon Eshkabilov 2022-12-24
So I have a function lets say B=a*cos(q), where a is a constant and q is an articulation angle.
Now to find the velocity I wrote diff(B,t), so it will differentiate it in terms of time, but it doesnt work, it results 0 , if I replace q with q(t) it returns an error because it thinks Im indexing.
How should I write this to calculate the derivative of B in terms of time ?

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Sulaymon Eshkabilov
Sulaymon Eshkabilov 2022-12-24
Ran in:
syms q(t) t a
diff(a*cos(q))
ans(t) = 

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