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x=cos55^(@),y=cos65^(@),z=cos175^(@)rArr...

x=cos55^(@),y=cos65^(@),z=cos175^(@)rArr xy+yz+zx=

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x=cos55^(@),y=cos65^(@),z=cos175^(@) then xy+yz+xz=

x = cos 55^(@), y = cos 65^(@), z= cos 175^(@) " then " xy+yz+ zx=

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

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

If p=cos55^(@),q=cos65^(@)andr=cos175^(@) , then the value of (1)/(p)+(1)/(q)+(r)/(pq) is

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

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

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