Recent content by mikeley

Thank you very much Fermat. No, I don't have to use the original form.

Try looking at these books: 1) Mathematics and Plausible Reasoning by G. Polya 2) How to Solve It by G. Polya

Would you like some salt and pepper to go with that :wink: in my equations I have only d4 not dA, and d2 is not d^2 and d4 is not d^4. d2 and d4 are two constants raised to the first degree. And yes, I checked my equations before posting, and they are ok. So some how in the result, t1=...

Sorry AKG and Fermat. Here is my post modified: a2, d4, Px, Py are all constants Px=\cos(\theta1)*(a2*\cos(\theta2)+d4*\sin(\theta2+\theta3))-d2*\sin(\theta1) Py=\sin(\theta1)*(a2*\cos(\theta2)+d4*\sin(\theta2+\theta3))+d2*\cos(\theta1)...

Can you please tell me how theta1 was obtained from this system: Px=C1(a2*C2+d4*S23)-d2*S1 Py=S1(a2*C2+d4*S23)+d2*C1 theta1=atan((Py*sqrt(Px^2+Py^2-d2^2)-d2*Px)/(Px*sqrt(Px^2+Py^2-d2^2)+d2*Py)) theta1=atan((-Py*sqrt(Px^2+Py^2-d2^2)-d2*Px)/(-Px*sqrt(Px^2+Py^2-d2^2)+d2*Py))

Thanks a lot. I managed to get the reduction you mentioned.

Hello, I have a system of trigonometric equations from which I should find theta1,..., theta5. Is it possible you can give me a hint on how to proceed. Thanks. theta, phi, psi, Px, Py, Pz, l1, l2, l3, l4, l5, d1, d2, d3, d4, d5 are all constants. Cos[t1+t2] Cos[t3+t4] Cos[t5]+Sin[t1+t2]...