表达式2: "d" equals StartFraction, distance left parenthesis, left parenthesis, 5 , 0 , right parenthesis , left parenthesis, 5cos left parenthesis, StartNestedFraction, 2 pi NestedOver "a" , EndNestedFraction , right parenthesis , 5sin left parenthesis, StartNestedFraction, 2 pi NestedOver "a" , EndNestedFraction , right parenthesis , right parenthesis , right parenthesis Over 2 , EndFractiond=distance5,0,5cos2πa,5sin2πa2
equals=
0.9 7 5 4 5 1 6 1 0 0 8 10.975451610081
2
表达式3: left parenthesis, "x" minus 5cos left parenthesis, left bracket, 1 , ... "a" , right bracket StartFraction, 2 pi Over "a" , EndFraction , right parenthesis , right parenthesis squared plus left parenthesis, "y" minus 5sin left parenthesis, left bracket, 1 , ... "a" , right bracket StartFraction, 2 pi Over "a" , EndFraction , right parenthesis , right parenthesis squared equals "d" squaredx−5cos1,...a2πa2+y−5sin1,...a2πa2=d2
3
表达式4: left parenthesis, left parenthesis, 5 plus left bracket, 1 , negative 1 , right bracket "d" , right parenthesis cos "t" , left parenthesis, 5 plus left bracket, 1 , negative 1 , right bracket "d" , right parenthesis sin "t" , right parenthesis5+1,−1dcost,5+1,−1dsint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
