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Angle CAF = 22.5 °
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表达式17: "B" Subscript, 2 , Baseline equals "R"
B
2
=
R
equals
=
10
1
0
17
表达式18: "C" Subscript, 1 , Baseline equals "R"
C
1
=
R
equals
=
10
1
0
18
表达式19: "C" Subscript, 2 , Baseline equals StartRoot, 0 , EndRoot
C
2
=
0
equals
=
0
0
19
表达式20: "D" Subscript, 1 , Baseline equals "E" Subscript, 2 , Baseline cosine left parenthesis, 90 minus "C" Subscript, "A" "F" , Baseline , right parenthesis cosine "C" Subscript, "A" "F" , Baseline
D
1
=
E
2
c
o
s
9
0
−
C
A
F
c
o
s
C
A
F
equals
=
2.7 0 5 9 8 0 5 0 0 7 3
2
.
7
0
5
9
8
0
5
0
0
7
3
20
表达式21: "D" Subscript, 2 , Baseline equals "E" Subscript, 2 , Baseline cosine left parenthesis, 90 minus "C" Subscript, "A" "F" , Baseline , right parenthesis sine "C" Subscript, "A" "F" , Baseline
D
2
=
E
2
c
o
s
9
0
−
C
A
F
s
i
n
C
A
F
equals
=
1.1 2 0 8 5 3 8 2 2 9 2
1
.
1
2
0
8
5
3
8
2
2
9
2
21
表达式22: "E" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline
E
1
=
A
1
equals
=
0
0
22
表达式23: "F" Subscript, 1 , Baseline equals "R" cosine "C" Subscript, "A" "F" , Baseline
F
1
=
R
c
o
s
C
A
F
equals
=
9.2 3 8 7 9 5 3 2 5 1 1
9
.
2
3
8
7
9
5
3
2
5
1
1
23
表达式24: "F" Subscript, 2 , Baseline equals "R" sine "C" Subscript, "A" "F" , Baseline
F
2
=
R
s
i
n
C
A
F
equals
=
3.8 2 6 8 3 4 3 2 3 6 5
3
.
8
2
6
8
3
4
3
2
3
6
5
24
Graphs
Graphs
对学生隐藏该文件夹。
25
表达式26: "y" less than 25
y
<
2
5
26
表达式27: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesis
R
c
o
s
t
,
R
s
i
n
t
0
0
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： 90
9
0
27
表达式28: polygon left parenthesis, "A" , "B" , "C" , right parenthesis
p
o
l
y
g
o
n
A
,
B
,
C
28
表达式29: polygon left parenthesis, "D" , "E" , "F" , right parenthesis
p
o
l
y
g
o
n
D
,
E
,
F
29
表达式30: 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 parenthesis
D
1
+
R
1
c
o
s
t
,
D
2
+
R
1
s
i
n
t
定义域t最小值： "C" Subscript, "A" "F" , Baseline
C
A
F
less than or equal to "t" less than or equal to
≤
t
≤
定义域t最大值： "C" Subscript, "A" "F" , Baseline plus 90
C
A
F
+
9
0
30
表达式31: polygon left parenthesis, "A" , "C" , "A" , "F" , "A" , "E" , "D" , "E" , "B" , right parenthesis
p
o
l
y
g
o
n
A
,
C
,
A
,
F
,
A
,
E
,
D
,
E
,
B
31
表达式32: 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 parenthesis
D
1
+
R
1
c
o
s
t
,
D
2
+
R
1
s
i
n
t
定义域t最小值： "C" Subscript, "A" "F" , Baseline
C
A
F
less than or equal to "t" less than or equal to
≤
t
≤
定义域t最大值： "C" Subscript, "A" "F" , Baseline plus 90
C
A
F
+
9
0
32
表达式33: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesis
R
c
o
s
t
,
R
s
i
n
t
0
0
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： 90
9
0
33
Points
Points
对学生隐藏该文件夹。
34
44
技术支持
技术支持
A
B
C
D
E
F
?
Blue Area = Yellow Area ⇒ CAF = ?
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
功能
(
(
)
)
less than
<
greater than
>
4
4
5
5
6
6
times
×
| "a" |
|
a
|
,
,
less than or equal to
≤
greater than or equal to
≥
1
1
2
2
3
3
negative
−
A B C
StartRoot, , EndRoot
pi
π
0
0
.
.
equals
=
positive
+
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