Expression 3: beta equals cosine to the negative 1st power StartFraction, 35 squared plus left parenthesis, 18 plus 30 , right parenthesis squared minus 21 squared Over 2 times 35 times left parenthesis, 18 plus 30 , right parenthesis , EndFractionβ=cos−1352+18+302−2122·35·18+30
equals=
23.2 1 2 7 5 4 9 0 823.212754908
3
Expression 4:
4
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Center:
center: left parenthesis, 0 , 0 , right parenthesis0,0