Expression 4: 2 "s" cosine StartFraction, 180 minus left parenthesis, 360 minus 90 minus 2 times 60 , right parenthesis Over 2 , EndFraction equals 82scos180−360−90−2·602=8
4
Expression 5: "s" equals StartFraction, 4 Over cos 15 , EndFractions=4cos15
equals=
4.1 4 1 1 0 4 7 2 1 6 44.14110472164
5
Expression 6:
6
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Center:
center: left parenthesis, 0 , 0 , right parenthesis0,0