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[" 2.Show that: "],[qquad [" th."cos24^(...

[" 2.Show that: "],[qquad [" th."cos24^(@)+cos55^(@)+cos125^(@),],[,+cos204^(@)+cos300^(@)=]]

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cos 300^@=

Prove that cos24^(@) + cos 55^(@) + cos125^(@) +cos204^(@) + cos300^(@) = 1/2

Evaluate : cos24^(@)+cos55^(@)+cos125^(@)+cos204^(@)+cos300^(@) .

Prove that cos 24^(@)+cos 55^(@)+cos 125^(@)+cos 204^(@)+cos 300^(@)=1/2

cos175^(@)+cos65^(@)+cos55^(@)=?

cos 24^(@) cos 48^(@) cos 96^(@) cos 192^(@) =

cos24^(0)+cos5^(0)+cos175^(0)+cos204^(0)+cos300^(@)

Prove that: cos24^(0)+cos55^(@)+cos125^(@)+cos20460+cos300^(@)=(1)/(2)