Recent content by Mr.Krypton

D is nothing it just a formula to solve the above ! btw thanks for ur help, I got a simple clue let me try !

no one to help me?

still didn't !

I'm new to this forum, anyhow thanks for the admin making such forum, doesn't matter ! I've been trying this calculation for one day still no answer, Homework Statement cos (A/2)+cos (B/2)+cos (C/2)=4cos [(B+C)/4]*cos [(C+A)/4]*cos [(A+B)/4] A+B+C = pi Homework Equations The Attempt at a...