Expression 7: "y" equals sine ( "a" ) left brace, cos ( "a" ) less than "x" less than 0 , right brace Has graph. To audio trace, press ALT+T.y=sin(a)cos(a)<x<0
7
Expression 8: "y" equals cosine left parenthesis, "x" , right parenthesis left brace, 0 less than "x" less than "a" , right brace Has graph. To audio trace, press ALT+T.y=cosx0<x<a
8
Expression 9: "x" equals "a" left brace, 0 less than "y" less than cos ( "a" ) , right brace Has graph.x=a0<y<cos(a)
9
(a,cos(a)) left parenthesis, "a" , cos "a" , right parenthesisa,cosa
equals=
left parenthesis, 4.2 9 9 , negative 0.4 0 1 7 1 5 1 4 , right parenthesis4.299,−0.40171514
10
Expression 11: "y" equals cosine left parenthesis, "x" , right parenthesis left brace, "a" less than "x" less than 0 , right brace Has graph.y=cosxa<x<0
11
Expression 12: "x" equals "a" left brace, cos left parenthesis, "a" , right parenthesis less than "y" less than 0 , right brace Has graph. To audio trace, press ALT+T.x=acosa<y<0
