Output is giving me Empty sym: 0-by-1

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준형 박
준형 박 2022-9-7
编辑： Torsten 2022-9-7
f=1995.26;
z=71440;
seta=-77.04;
syms c R;
eqns = [ seta - atan( 1 / ( -2 * pi * f * c * R )) == 0, z^2 - 1 / ((R)^2 + ( 2 * pi * f * c )^2 ) == 0];
vars = [c R];
[solc, solR] = vpasolve(eqns,vars)
I'm trying to solve for the equations, but I'm getting the "Empty sym: 0-by-1" output, and I'm unsure why. I don't know why this is being outputted. i want to get c and R.

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Torsten
Torsten 2022-9-7
编辑：Torsten 2022-9-7
Ran in:
f=1995.26;
z=71440;
seta=-77.04;
syms c R;
eqns = [ tand(seta) + 1 / ( 2 * pi * f * c * R ) == 0, z^2 - 1 / (R^2 + ( 2 * pi * f * c )^2 ) == 0];
vars = [c R];
[solc, solR] = vpasolve(eqns,vars)
solc = 
solR = 

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