Missing Angle BEF = 70°

運算式 12: "C" Subscript, 2 , Baseline equals "B" Subscript, 1 , Baseline sine 40

equals

12.2 1 2 9 6 4 5 8 4

運算式 13: "D" Subscript, 1 , Baseline equals StartFraction, "C" Subscript, 1 , Baseline Over 2 , EndFraction

equals

7.2 7 7 4 2 2 2 0 9 6 3

運算式 14: "C" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline cosine 40

equals

14.5 5 4 8 4 4 4 1 9 3

運算式 15: "D" Subscript, 2 , Baseline equals StartFraction, "C" Subscript, 2 , Baseline Over 2 , EndFraction

equals

6.1 0 6 4 8 2 2 9 2 0 2

運算式 16: "F" Subscript, 1 , Baseline equals StartFraction, "B" Subscript, 1 , Baseline plus "C" Subscript, 1 , Baseline Over 2 , EndFraction

equals

16.7 7 7 4 2 2 2 0 9 6

運算式 17: "F" Subscript, 2 , Baseline equals StartFraction, "B" Subscript, 2 , Baseline plus "C" Subscript, 2 , Baseline Over 2 , EndFraction

equals

6.1 0 6 4 8 2 2 9 2 0 2

運算式 18: "M" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline

equals

運算式 19: "M" Subscript, 2 , Baseline equals "R"

equals

6.9 1 5 4 3 4 4 5 1 0 6

Graphs

運算式 21: "y" less than 40

運算式 22: polygon left parenthesis, "A" , "B" , "D" , "E" , "F" , "E" , "B" , "C" , right parenthesis

運算式 23: left parenthesis, "M" Subscript, 1 , Baseline plus "R" cos "t" , "M" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesis

定義域 t 最小值：

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

定義域 t 最大值： 360

Points

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