表达式20: "E" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline plus "B" Subscript, "E" , Baseline cosine left parenthesis, 2 "A" Subscript, "B" "D" , Baseline minus 90 , right parenthesisE1=B1+BEcos2ABD−90
equals=
9.69.6
20
表达式21: "E" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline plus "B" Subscript, "E" , Baseline sine left parenthesis, 2 "A" Subscript, "B" "D" , Baseline minus 90 , right parenthesisE2=B2+BEsin2ABD−90
equals=
2.82.8
21
表达式22: "F" Subscript, 1 , Baseline equals left parenthesis, "R" minus "R" Subscript, 2 , Baseline , right parenthesis cosine left parenthesis, 90 minus StartFraction, "B" Subscript, "A" "E" , Baseline Over 2 , EndFraction , right parenthesisF1=R−R2cos90−BAE2
equals=
5.45.4
22
表达式23: "F" Subscript, 2 , Baseline equals left parenthesis, "R" minus "R" Subscript, 2 , Baseline , right parenthesis sine left parenthesis, 90 minus StartFraction, "B" Subscript, "A" "E" , Baseline Over 2 , EndFraction , right parenthesisF2=R−R2sin90−BAE2
equals=
7.27.2
23
Graphs
对学生隐藏该文件夹。
24
表达式25: "y" less than 30y<30
25
表达式26: left parenthesis, "F" Subscript, 1 , Baseline plus "R" Subscript, 2 , Baseline cos "t" , "F" Subscript, 2 , Baseline plus "R" Subscript, 2 , Baseline sin "t" , right parenthesisF1+R2cost,F2+R2sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 360360
26
表达式27: left parenthesis, "F" Subscript, 1 , Baseline plus "R" Subscript, 2 , Baseline cos "t" , "F" Subscript, 2 , Baseline plus "R" Subscript, 2 , Baseline sin "t" , right parenthesisF1+R2cost,F2+R2sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 360360
27
表达式28: left parenthesis, "D" Subscript, 1 , Baseline plus "R" Subscript, 1 , Baseline cos "t" , "D" Subscript, 2 , Baseline plus "R" Subscript, 1 , Baseline sin "t" , right parenthesisD1+R1cost,D2+R1sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 180180
28
表达式29: left parenthesis, "F" Subscript, 1 , Baseline plus "R" Subscript, 2 , Baseline cos "t" , "F" Subscript, 2 , Baseline plus "R" Subscript, 2 , Baseline sin "t" , right parenthesisF1+R2cost,F2+R2sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 360360
29
表达式30: polygon left parenthesis, "A" , "C" , "A" , "F" , "A" , "B" , "E" , right parenthesispolygonA,C,A,F,A,B,E
30
表达式31: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesisRcost,Rsint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 9090
31
表达式32: polygon left parenthesis, "A" , "C" , right parenthesispolygonA,C
