運算式 4: "E" left parenthesis, "t" , right parenthesis equals left parenthesis, "a" cos left parenthesis, "t" , right parenthesis , "b" sin left parenthesis, "t" , right parenthesis , right parenthesisEt=acost,bsint
4
運算式 5: "E" left parenthesis, "t" , right parenthesisEt
定義域 t 最小值： 00
less than or equal to "t" less than or equal to≤t≤
定義域 t 最大值： StartFraction, pi Over 4 , EndFractionπ4
5
運算式 6: "E" left parenthesis, "t" , right parenthesisEt
定義域 t 最小值： StartFraction, pi Over 4 , EndFractionπ4
less than or equal to "t" less than or equal to≤t≤
定義域 t 最大值： StartFraction, pi Over 2 , EndFractionπ2
6
beta = pi/4: "E" left parenthesis, StartFraction, pi Over 4 , EndFraction , right parenthesisEπ4
