solve not returning answers

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RH
RH 2023-3-9
评论： RH 2023-3-9
Ran in:
Hi. I'm having touble solving this set of equations in Matlab.
syms a b;
eq1=2==cos(a)+(3/5)*sqrt(5)*cos(b);
eq2=0==sin(a)+(3/5)*sqrt(5)*sin(b);
eqns=[eq1, eq2];
solve(eqns,[a b])
ans = struct with fields:
a: [2×1 sym] b: [2×1 sym]
The answers should be 36.9 and -26.6 degrees. But I cannot get this with solve. Any feedback is appreciated. Thanks!

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采纳的回答

Sarvesh Kale
Sarvesh Kale 2023-3-9
Ran in:
Hi RH,
I think you have to index into the answer since the ans variable is a struct, try the following
syms a b;
eq1=2==cos(a)+(3/5)*sqrt(5)*cos(b);
eq2=0==sin(a)+(3/5)*sqrt(5)*sin(b);
eqns=[eq1, eq2];
x = solve(eqns,[a b]);
disp(x.a)
disp(x.b) % indexing into x
I hope this solves your query
Thank you

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