File mttroot/mtt/lib/examples/Mechanical/Mechanical-2D/TwoLinkxyn/TwoLinkxyn_simp.r artifact f03e08b08b part of check-in f9bcb979da

%% Reduce comands to simplify output for system TwoLinkxyn (TwoLinkxyn_simp.r)

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        trig1 := {cos(~x)*cos(~y) => (cos(x+y)+cos(x-y))/2,
                  cos(~x)*sin(~y) => (sin(x+y)-sin(x-y))/2,
                  sin(~x)*sin(~y) => (cos(x-y)-cos(x+y))/2,
                  cos(~x)^2       => (1+cos(2*x))/2,
                  sin(~x)^2       => (1-cos(2*x))/2};
       LET trig1;

END;