How can i correct this error "Parse error ´(´"

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Ana María Hernández Salinas
评论： Ana María Hernández Salinas 2021-3-12
Ok so basically my problem is that while i was writing some functions i got this error "Invalid expression", it says in what line is the problem, but personally i have corrected it a couple times now and still the same, this is my code: (else function)
if fB==0
y=(B/A)*x;
elseif fB==pi/2
y=sqrt(B.^2*(1-((x.^2)/A.^2)));
elseif fB==pi
y=-(B/A)*x;
else
y = A*B*x*cos(fB)-sqrt((A.^2)*B.^2*(A.^2)*sin^2(fB)+(x.^2)*cos^2(fB)-x.^2)/(A.^2);
end

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采纳的回答

KSSV
KSSV 2021-3-12
编辑：KSSV 2021-3-12
x=A*sin(w*t+fA);
y=B*cos(w*t+fB);
if fB==0
y=(B/A)*x;
elseif fB==pi/2
y=sqrt(B.^2*(1-((x.^2)/A.^2)));
elseif fB==pi
y=-(B/A)*x;
else
y = A*B*x*cos(fB)-sqrt((A.^2)*B.^2*(A.^2)*sin(fB)^2+(x.^2)*cos(fB)^2-x.^2)/(A.^2); %<-- change here
end

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