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Proof that FG = R₁
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表达式23: "D" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline plus left parenthesis, "A" Subscript, "C" , Baseline minus "R" Subscript, 1 , Baseline , right parenthesis sine StartFraction, "B" Subscript, "O" "C" , Baseline Over 2 , EndFraction
D
2
=
A
2
+
A
C
−
R
1
s
i
n
B
O
C
2
equals
=
5.5 8 9 5 2 9 8 3 9 8 2
5
.
5
8
9
5
2
9
8
3
9
8
2
23
表达式24: "E" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline minus left parenthesis, "B" Subscript, "C" , Baseline minus "R" Subscript, 1 , Baseline , right parenthesis sine StartFraction, "B" Subscript, "O" "C" , Baseline Over 2 , EndFraction
E
1
=
B
1
−
B
C
−
R
1
s
i
n
B
O
C
2
equals
=
- 0.1 1 0 0 1 8 1 5 3 0 9 2
-
0
.
1
1
0
0
1
8
1
5
3
0
9
2
24
表达式25: "E" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline plus left parenthesis, "B" Subscript, "C" , Baseline minus "R" Subscript, 1 , Baseline , right parenthesis cosine StartFraction, "B" Subscript, "O" "C" , Baseline Over 2 , EndFraction
E
2
=
B
2
+
B
C
−
R
1
c
o
s
B
O
C
2
equals
=
6.4 3 8 3 2 4 2 8 6 8
6
.
4
3
8
3
2
4
2
8
6
8
25
表达式26: tangent to the negative 1st power StartFraction, "F" Subscript, 1 , Baseline minus "H" Subscript, 1 , Baseline Over "C" Subscript, 2 , Baseline , EndFraction equals StartFraction, "B" Subscript, "O" "C" , Baseline Over 2 times 2 , EndFraction
t
a
n
−
1
F
1
−
H
1
C
2
=
B
O
C
2
·
2
26
表达式27: "F" Subscript, 1 , Baseline equals "C" Subscript, 2 , Baseline tangent left parenthesis, StartFraction, "B" Subscript, "O" "C" , Baseline Over 2 times 2 , EndFraction , right parenthesis plus "H" Subscript, 1 , Baseline
F
1
=
C
2
t
a
n
B
O
C
2
·
2
+
H
1
equals
=
1.3 8 8 6 1 3 4 2 0 6 7
1
.
3
8
8
6
1
3
4
2
0
6
7
27
表达式28: "F" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline
F
2
=
O
2
equals
=
0
0
28
表达式29: "G" Subscript, 1 , Baseline equals "M" Subscript, 1 , Baseline
G
1
=
M
1
equals
=
negative 2.1 5 5 4 6 7 2 8 6 1 2
−
2
.
1
5
5
4
6
7
2
8
6
1
2
29
表达式30: "G" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline
G
2
=
O
2
equals
=
0
0
30
表达式31: "H" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline
H
1
=
C
1
equals
=
negative 3.0 0 4 2 6 1 7 3 3 1
−
3
.
0
0
4
2
6
1
7
3
3
1
31
表达式32: "H" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline
H
2
=
O
2
equals
=
0
0
32
表达式33: "M" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline plus "A" Subscript, "M" , Baseline cosine StartFraction, "B" Subscript, "O" "C" , Baseline Over 4 , EndFraction
M
1
=
A
1
+
A
M
c
o
s
B
O
C
4
equals
=
negative 2.1 5 5 4 6 7 2 8 6 1 2
−
2
.
1
5
5
4
6
7
2
8
6
1
2
33
表达式34: "M" Subscript, 2 , Baseline equals "A" Subscript, "M" , Baseline sine StartFraction, "B" Subscript, "O" "C" , Baseline Over 4 , EndFraction
M
2
=
A
M
s
i
n
B
O
C
4
equals
=
3.5 4 4 0 8 0 7 0 6 7 9
3
.
5
4
4
0
8
0
7
0
6
7
9
34
Graphs
Graphs
对学生隐藏该文件夹。
35
表达式36: "y" less than 25
y
<
2
5
36
表达式37: left parenthesis, "M" Subscript, 1 , Baseline plus "R" Subscript, 1 , Baseline cos "t" , "M" Subscript, 2 , Baseline plus "R" Subscript, 1 , Baseline sin "t" , right parenthesis
M
1
+
R
1
c
o
s
t
,
M
2
+
R
1
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： 360
3
6
0
37
表达式38: left parenthesis, "M" Subscript, 1 , Baseline plus "R" Subscript, 1 , Baseline cos "t" , "M" Subscript, 2 , Baseline plus "R" Subscript, 1 , Baseline sin "t" , right parenthesis
M
1
+
R
1
c
o
s
t
,
M
2
+
R
1
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： 360
3
6
0
38
表达式39: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesis
p
o
l
y
g
o
n
A
,
B
,
C
,
D
39
表达式40: 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： 180
1
8
0
40
隐藏 标签 "G" , "M"
G
,
M
标签
equals
=
left parenthesis, negative 2.1 5 5 , 0 , right parenthesis
−
2
.
1
5
5
,
0
left parenthesis, negative 2.1 5 5 , 3.5 4 4 , right parenthesis
−
2
.
1
5
5
,
3
.
5
4
4
41
隐藏 标签 "C" , "H"
C
,
H
标签
equals
=
left parenthesis, negative 3.0 0 4 , 8.4 8 4 , right parenthesis
−
3
.
0
0
4
,
8
.
4
8
4
left parenthesis, negative 3.0 0 4 , 0 , right parenthesis
−
3
.
0
0
4
,
0
42
隐藏 标签 "M" , "F"
M
,
F
标签
equals
=
left parenthesis, negative 2.1 5 5 , 3.5 4 4 , right parenthesis
−
2
.
1
5
5
,
3
.
5
4
4
left parenthesis, 1.3 8 9 , 0 , right parenthesis
1
.
3
8
9
,
0
43
隐藏 标签 "C" , "F"
C
,
F
标签
equals
=
left parenthesis, negative 3.0 0 4 , 8.4 8 4 , right parenthesis
−
3
.
0
0
4
,
8
.
4
8
4
left parenthesis, 1.3 8 9 , 0 , right parenthesis
1
.
3
8
9
,
0
44
Points
Points
对学生隐藏该文件夹。
45
62
技术支持
技术支持
O
A
B
F
G
H
C
D
E
M
Start black, "R" Subscript, 1 , Baseline End black
R
1
Start black, "R" Subscript, 1 , Baseline End black
R
1
5 Right Triangles in a Semicircle
"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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