表达式4: alpha equals cosine to the negative 1st power StartFraction, left parenthesis, 6 plus 7 , right parenthesis squared plus left parenthesis, 6 plus 8 , right parenthesis squared minus left parenthesis, 7 plus 8 , right parenthesis squared Over 2 times left parenthesis, 6 plus 7 , right parenthesis times left parenthesis, 6 plus 8 , right parenthesis , EndFractionα=cos−16+72+6+82−7+822·6+7·6+8
equals=
67.3 8 0 1 3 5 0 5 267.380135052
4
表达式5: "h" equals 7 plus 8 plus left parenthesis, 6 plus 7 , right parenthesis sine alphah=7+8+6+7sinα
equals=
2727
5
表达式6: "w" equals 2 left parenthesis, 6 plus 8 , right parenthesisw=26+8
equals=
2828
6
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center: left parenthesis, 0 , 0 , right parenthesis0,0
