DCE = 150. BAD = 105

表达式15: "C" Subscript, 1 , Baseline equals "R" cosine "B" Subscript, "O" "C" , Baseline

equals

negative 5

表达式16: "C" Subscript, 2 , Baseline equals "R" sine "B" Subscript, "O" "C" , Baseline

equals

8.6 6 0 2 5 4 0 3 7 8 4

表达式17: "D" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline minus "R" cosine left parenthesis, negative "A" Subscript, "B" "C" , Baseline , right parenthesis

equals

negative 13.6 6 0 2 5 4 0 3 7 8

表达式18: "D" Subscript, 2 , Baseline equals "C" Subscript, 2 , Baseline minus "R" sine left parenthesis, negative "A" Subscript, "B" "C" , Baseline , right parenthesis

equals

13.6 6 0 2 5 4 0 3 7 8

表达式19: "E" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline plus "R"

equals

表达式20: "E" Subscript, 2 , Baseline equals "C" Subscript, 2 , Baseline

equals

8.6 6 0 2 5 4 0 3 7 8 4

Graphs

表达式22: "y" less than 25

表达式23: polygon left parenthesis, "A" , "B" , "D" , right parenthesis

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

表达式25: left parenthesis, "C" Subscript, 1 , Baseline plus "R" cos "t" , "C" Subscript, 2 , Baseline plus "R" sin "t" , 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： 180

表达式26: polygon left parenthesis, "A" , "B" , "D" , "A" , right parenthesis

表达式27: left parenthesis, "R" cos "t" , "R" sin "t" , 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： 180

表达式28: left parenthesis, "C" Subscript, 1 , Baseline plus "t" "R" , "C" Subscript, 2 , Baseline , right parenthesis

定义域t最小值： negative 1

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

定义域t最大值：

Points

技术支持

∠ BAD = ?

∠ DCE = ?