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" 10.If "m tan(theta-30^(@))=n tan(theta...

" 10.If "m tan(theta-30^(@))=n tan(theta+120^(@))" .Prove that "cos20=(m+n)/(n)

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m tan(theta-30^(@))=n tan(theta+120^(@)) show that cos2 theta=(m+n)/(2(m-n))

If m tan (theta - 30^(@))= n tan (theta + 120^(@)), show that cos 2 theta = (m +n)/(2 (m -n)).

If mtan(theta-30^(@))=ntan(theta+120^(@)) , then (m+n)/(m-n)=?

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