Expression 3: cosine left parenthesis, "p" "R" arctan left parenthesis, StartFraction, "x" Over StartRoot, "y" squared plus "R" squared , EndRoot , EndFraction , right parenthesis , right parenthesiscospRarctanxy2+R2
3
Expression 4: "z" equals cosine left parenthesis, "p" "x" , right parenthesisz=cospx
4
Expression 5: "x" squared plus "y" squared equals "R" squaredx2+y2=R2