Missing Angle BTF = 18°

表达式19: "C" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline plus "s" cosine left parenthesis, StartFraction, alpha Over 2 , EndFraction plus 180 minus beta plus 60 , right parenthesis

表达式20: "C" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline plus "s" sine left parenthesis, StartFraction, alpha Over 2 , EndFraction plus 180 minus beta plus 60 , right parenthesis

表达式21: "D" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline plus "s" cosine left parenthesis, negative 36 minus 90 , right parenthesis

表达式22: "D" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline

表达式23: "E" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline

表达式24: "E" Subscript, 2 , Baseline equals negative "C" Subscript, 2 , Baseline

表达式25: "F" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline

表达式26: "F" Subscript, 2 , Baseline equals negative "B" Subscript, 2 , Baseline

表达式27: "G" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline

表达式28: "G" Subscript, 2 , Baseline equals negative "A" Subscript, 2 , Baseline

表达式29: "T" Subscript, 1 , Baseline equals negative "R"

表达式30: "T" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline

Graphs

表达式32: "y" less than 40

表达式33: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesis

表达式34: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesis

表达式35: polygon left parenthesis, "A" , "C" , "A" , "B" , "C" , "D" , "E" , "F" , "G" , "E" , "G" , right parenthesis

表达式36: polygon left parenthesis, "O" , "B" , "T" , "B" , "O" , "A" , "O" , "G" , "O" , "F" , "T" , "F" , right parenthesis

Points

技术支持