表达式7: left brace, "x" greater than or equal to 0 : left parenthesis, "x" squared plus "y" squared , right parenthesis cos left parenthesis, "n" arctan left parenthesis, StartFraction, "y" Over "x" , EndFraction , right parenthesis plus phi , right parenthesis , right brace greater than or equal to "z"x≥0:x2+y2cosnarctanyx+ϕ≥z
7
表达式8: left brace, "x" less than 0 : left parenthesis, "x" squared plus "y" squared , right parenthesis cos left parenthesis, "n" arctan left parenthesis, StartFraction, "y" Over "x" , EndFraction , right parenthesis plus pi plus phi , right parenthesis , right brace greater than or equal to "z"x<0:x2+y2cosnarctanyx+π+ϕ≥z
8
表达式9: "z" equals negative 1z=−1
negative 1−1
positive 1+1
9
表达式10: "n" equals 5n=5
11
77
10
表达式11: phi equals negative 0.6 9 4ϕ=−0.694
negative StartFraction, pi Over 4 , EndFraction−π4
positive StartFraction, pi Over 4 , EndFraction+π4
11
表达式12: "x" squared plus "y" squared equals 1x2+y2=1
