thanks,

this not work, the anwer that maple show is sqrt. are you chek it?

thanks,

this not work, the anwer that maple show is sqrt. are you chek it?

hi

thx for your answers,

excuse me, i forgot to say that d is 1/( sqrt(a^2+p^2) )

in these equations tao,s,d,p,a are constant.

a:= sin(theta + tao*s)*cos(d*s) + p*d*cos(theta + tao*s)*sin(d*s); 
bb:=  sin(theta + tao*s)*sin(d*s) - p*d*cos(theta + tao*s)*cos(d*s);
cc:= a*d*cos(theta + tao*s); 

thx

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