表达式17: "D" Subscript, 1 , Baseline equals StartFraction, "A" Subscript, 1 , Baseline plus "B" Subscript, 1 , Baseline Over 2 , EndFractionD1=A1+B12
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表达式18: "D" Subscript, 2 , Baseline equals StartFraction, "A" Subscript, 2 , Baseline plus "B" Subscript, 2 , Baseline Over 2 , EndFractionD2=A2+B22
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表达式19: "M" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline plus "B" Subscript, "M" , Baseline cosine left parenthesis, StartFraction, "A" Subscript, "B" "C" , Baseline Over 2 , EndFraction minus 90 , right parenthesisM1=B1+BMcosABC2−90
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表达式20: "M" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline plus "B" Subscript, "M" , Baseline sine left parenthesis, StartFraction, "A" Subscript, "B" "C" , Baseline Over 2 , EndFraction minus 90 , right parenthesisM2=B2+BMsinABC2−90
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表达式21: "N" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline plus "A" Subscript, "N" , Baseline cosine left parenthesis, 180 minus StartFraction, "B" Subscript, "A" "C" , Baseline Over 2 , EndFraction , right parenthesisN1=A1+ANcos180−BAC2
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表达式22: "N" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline plus "A" Subscript, "N" , Baseline sine left parenthesis, 180 minus StartFraction, "B" Subscript, "A" "C" , Baseline Over 2 , EndFraction , right parenthesisN2=A2+ANsin180−BAC2
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Graphs
对学生隐藏该文件夹。
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表达式24: polygon left parenthesis, "M" , "N" , right parenthesispolygonM,N
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表达式25: polygon left parenthesis, "A" , "B" , "C" , right parenthesispolygonA,B,C
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表达式26: left parenthesis, "N" Subscript, 1 , Baseline plus "R" cos "t" , "N" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesisN1+Rcost,N2+Rsint
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表达式27: left parenthesis, "M" Subscript, 1 , Baseline plus "R" cos "t" , "M" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesisM1+Rcost,M2+Rsint
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表达式28: left parenthesis, "N" Subscript, 1 , Baseline minus StartFraction, "t" left parenthesis, "N" Subscript, 2 , Baseline minus "M" Subscript, 2 , Baseline , right parenthesis Over 2 , EndFraction , "N" Subscript, 2 , Baseline plus StartFraction, "t" left parenthesis, "N" Subscript, 1 , Baseline minus "M" Subscript, 1 , Baseline , right parenthesis Over 2 , EndFraction , right parenthesisN1−tN2−M22,N2+tN1−M12
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表达式29: left parenthesis, "M" Subscript, 1 , Baseline minus StartFraction, "t" left parenthesis, "N" Subscript, 2 , Baseline minus "M" Subscript, 2 , Baseline , right parenthesis Over 2 , EndFraction , "M" Subscript, 2 , Baseline plus StartFraction, "t" left parenthesis, "N" Subscript, 1 , Baseline minus "M" Subscript, 1 , Baseline , right parenthesis Over 2 , EndFraction , right parenthesisM1−tN2−M22,M2+tN1−M12
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表达式30: left parenthesis, 2cos 45 , 2sin 45 minus "t" StartRoot, 2 , EndRoot , right parenthesis2cos45,2sin45−t2
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表达式31: left parenthesis, 2cos 45 minus "t" StartRoot, 2 , EndRoot , 2sin 45 , right parenthesis2cos45−t2,2sin45
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表达式32: left parenthesis, "M" Subscript, 1 , Baseline minus "t" "R" , "M" Subscript, 2 , Baseline , right parenthesisM1−tR,M2
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表达式33: left parenthesis, "N" Subscript, 1 , Baseline , "N" Subscript, 2 , Baseline minus "t" "R" , right parenthesisN1,N2−tR
