1.

From any point on the hyperbolax^(2) -y^(2) =a^(2) -b^(2)two tangents are drawn to the ellipsex^(2)//a^(2) +y^(2) //b^(2) =1Then they make anglesalpha and betasuch that

Answer»

` tan alpha -tan beta +1`
` tan alpha + tan beta =1`
` tan alpha tan beta =1`
` tan alpha tan beta =-1`

Answer :C


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