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" Q."5" if "p=cos55^(@),q=cos65^(@),r=co...

" Q."5" if "p=cos55^(@),q=cos65^(@),r=cos175^(@)" then tevale of "(1)/(2)+(1)/(2)+(1)/(2)

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

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

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

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

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

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

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

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