Expression 3: "A" Subscript, "B" "C" , Baseline equals cosine to the negative 1st power StartFraction, 6 squared plus 7 squared minus 8 squared Over 2 times 6 times 7 , EndFractionABC=cos−162+72−822·6·7
equals=
75.5 2 2 4 8 7 8 1 4 175.5224878141
3
Expression 4: alpha equals StartFraction, cos to the negative 1st power left parenthesis, StartNestedFraction, 6 squared plus 8 squared minus 7 squared NestedOver 2 times 6 times 8 , EndNestedFraction , right parenthesis Over 2 , EndFractionα=cos−162+82−722·6·82
equals=
28.9 5 5 0 2 4 3 7 1 928.9550243719
4
Expression 5:
5
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center: left parenthesis, 0 , 0 , right parenthesis0,0