Expression 5: "y" equals left parenthesis, tan "A" , right parenthesis times "x" left brace, 0 less than "x" less than cos "A" , right bracey=tanA·x0<x<cosA
5
Expression 6: "y" equals left parenthesis, tan "A" , right parenthesis times "x" left brace, cos "A" less than "x" less than 0 , right bracey=tanA·xcosA<x<0
6
Expression 7: "x" equals cosine ( "A" ) left brace, 0 less than "y" less than sin ( "A" ) , right bracex=cos(A)0<y<sin(A)
7
Expression 8: "x" equals cosine ( "A" ) left brace, sin ( "A" ) less than "y" less than 0 , right bracex=cos(A)sin(A)<y<0