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[" 114."cos^(3)70^(@)+cos^(3)110^(@)+cos...

[" 114."cos^(3)70^(@)+cos^(3)110^(@)+cos^(3)130^(@)=],[[" 1) "37/4," 2) "3/8]]

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cos^(3)110^(@)+cos^(3)10^(@)+cos^(3)130^(@)=

cos^(3)10^(@)+cos^(3)110^(@)+cos^(3)130^(@)=?

cos^(3) 20^(@) + cos^(3) 100^(@) + cos^(3) 140^(@) =

cos ^(3) 110 ^(@) + cos ^(3) 10^(@) + cos ^(3) 130^(@)=

cos ^(3) 110 ^(@) + cos ^(3) 10^(@) + cos ^(3) 130^(@)=

cos130^(@)+cos110^(@)+cos10^(@)=0

cos130^(@)+cos110^(@)+cos10^(@)=0

cos170^(@)cos150^(@)cos130^(@)cos110^(@)=

cos ^ (3) 10 ^ (@) + cos ^ (3) 110 ^ (@) + cos ^ (3) 130 ^ (@) =

(cos^(3)21^(@)+cos^(3)39^(@))/(cos21^(@)+cos39^(@))=