Expression 5: StartFraction, StartRoot, 2 , EndRoot cos left parenthesis, "t" , right parenthesis Over 2 "a" , EndFraction "x" plus StartFraction, left parenthesis, sin left parenthesis, "t" , right parenthesis , right parenthesis Over "a" , EndFraction "y" equals 12cost2ax+sintay=1
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Expression 6: "t" equals 4.4 9 4t=4.494
00
2 pi2π
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Expression 7: left parenthesis, "x" minus StartRoot, 2 , EndRoot "a" cos left parenthesis, "t" , right parenthesis , right parenthesis left parenthesis, "x" minus 2 "a" , right parenthesis plus left parenthesis, "y" minus "a" sin left parenthesis, "t" , right parenthesis , right parenthesis left parenthesis, "y" minus StartFraction, 1 Over sin left parenthesis, "t" , right parenthesis , EndFraction left parenthesis, "a" minus StartRoot, 2 , EndRoot "a" cos left parenthesis, "t" , right parenthesis , right parenthesis , right parenthesis equals 0x−2acostx−2a+y−asinty−1sinta−2acost=0
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定点T(a,0) left parenthesis, "a" , 0 , right parenthesisa,0
Label:
8
Q: left parenthesis, 2 "a" , StartFraction, 1 Over sin left parenthesis, "t" , right parenthesis , EndFraction left parenthesis, "a" minus StartRoot, 2 , EndRoot "a" cos left parenthesis, "t" , right parenthesis , right parenthesis , right parenthesis2a,1sinta−2acost