Missing Angle DBO = 115°

表达式13: "B" Subscript, 1 , Baseline equals left parenthesis, "A" Subscript, "O" , Baseline plus 2.7 4 5 , right parenthesis cosine left parenthesis, 100 minus 70 halves , right parenthesis

equals

3.7 3 8 0 5 8 5 2 5 1

表达式14: "B" Subscript, 2 , Baseline equals left parenthesis, "A" Subscript, "O" , Baseline plus 2.7 4 5 , right parenthesis sine left parenthesis, 100 minus 70 halves , right parenthesis

equals

8.0 1 6 2 9 2 3 7 6 3 4

表达式15: "C" Subscript, 1 , Baseline equals "A" Subscript, 2 , Baseline cosine 30

equals

5.2 0 2 4 9 8 0 4 4 9 1

表达式16: "C" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline sine 30

equals

3.0 0 3 6 6 3 6 4 6 6 9

表达式17: "D" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline plus 3

equals

6.7 3 8 0 5 8 5 2 5 1

表达式18: "D" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline

equals

8.0 1 6 2 9 2 3 7 6 3 4

Graphs

表达式20: "y" less than 25

表达式21: left parenthesis, "A" Subscript, 1 , Baseline minus "t" 3 , "A" Subscript, 2 , Baseline , right parenthesis

定义域t最小值：

less than or equal to "t" less than or equal to

定义域t最大值：

表达式22: left parenthesis, "C" Subscript, 1 , Baseline plus "t" 3 , "C" Subscript, 2 , Baseline , right parenthesis

定义域t最小值：

less than or equal to "t" less than or equal to

定义域t最大值：

表达式23: left parenthesis, "B" Subscript, 1 , Baseline plus "t" 3 , "B" Subscript, 2 , Baseline , right parenthesis

定义域t最小值：

less than or equal to "t" less than or equal to

定义域t最大值：

表达式24: polygon left parenthesis, "A" , "O" , "B" , "O" , "C" , "O" , right parenthesis

Points

技术支持

100

150