Expression 6: "a" "x" plus StartFraction, 1 Over "a" , EndFraction "x" Has graph. To audio trace, press ALT+T.ax+1ax
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Expression 7: 1 half "a" cosine left parenthesis, 1 half "x" plus 2 "a" , right parenthesis minus 6 pi greater than "y" Has graph. To audio trace, press ALT+T.12acos12x+2a−6π>y
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Expression 8: 1 half "a" cosine left parenthesis, 1 half "x" plus 2 "a" , right parenthesis plus 6 pi less than "y" Has graph. To audio trace, press ALT+T.12acos12x+2a+6π<y
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Expression 9: 1 half "a" cosine left parenthesis, 1 half "y" plus 2 "a" , right parenthesis plus 6 pi less than "x" Has graph. To audio trace, press ALT+T.12acos12y+2a+6π<x
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Expression 10: 1 half "a" cosine left parenthesis, 1 half "y" plus 2 "a" , right parenthesis minus 6 pi greater than "x" Has graph. To audio trace, press ALT+T.12acos12y+2a−6π>x
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Expression 11: StartFraction, 1 Over pi , EndFraction "x" sine "x"1πxsinx
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Expression 12: left parenthesis, cos "a" , right parenthesis "x" squared less than left parenthesis, sin "a" , right parenthesis "y" squared plus "a"cosax2<sinay2+a