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Symbolic collect and display

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Ole on 31 Aug 2019
Commented: Star Strider on 31 Aug 2019
I would lie to display the coefficients before the expansion terms of the cos one by one.
syms x y
f = expand(sin(x + 3*y));
coeffs_cosy = collect(f, cos(y))
How can the terms before the cos^n be displayed one by one?
This is short but for more complicated expressions, several dimensions the taylor series output text that cannot be displayed.

Accepted Answer

Star Strider
Star Strider on 31 Aug 2019
I am not certain what result you want.
Try this:
[cfs,trm] = coeffs(coeffs_cosy, cos(y))
cfs =
[ 4*sin(x), 4*cos(x)*sin(y), -3*sin(x), -cos(x)*sin(y)]
trm =
[ cos(y)^3, cos(y)^2, cos(y), 1]
Experiment with the coeffs arguments to get the result you want.

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