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" (i) "cos55^(@)+cos65^(@)+cos175^(@)=0...

" (i) "cos55^(@)+cos65^(@)+cos175^(@)=0

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Prove that, cos55^(@)+cos65^(@)+cos175^(@)=0

Prove that cos 55^(@)+cos65^(@)+cos175^(@)=0

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

Prove that cos55^(@)+cos65^(@)+cos175^(0)=0

Prove that cos55^(@)+cos65^(@)+cos175^(0)=0

cos 25^(@) - cos65^(@) =

Prove that: cos55^(@)+cos65^(0)+cos175^(0)=0

find cos175^(@)+cos65^(@)+cos55^(@)

cos 55^(@) + cos 65^(@) + cos 175^(@)= A)0B)1C) sin 18^(@) D) cos 36 ^(@)

Prove that: cos175^(@)+cos65^(@)+cos55^(@)=0