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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.
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### Accepted Answer

Star Strider on 31 Aug 2019
I am not certain what result you want.
Try this:
[cfs,trm] = coeffs(coeffs_cosy, cos(y))
producing:
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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Star Strider on 31 Aug 2019
As always, my pleasure!

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