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
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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
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Expression 9: "x" equals "a" left brace, 0 less than "y" less than cos ( "a" ) , right brace Has graph.x=a0<y<cos(a)
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(a,cos(a)) left parenthesis, "a" , cos "a" , right parenthesis Has graph. To audio trace, press ALT+T.a,cosa
Label:
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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
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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
