1.

If a= ( b-c)sec theta " then "tan theta =

Answer»

` ( 2sqrt(bc))/( b-c) SIN ""(A)/(2) `
` ( 2sqrt(bc))/( b+c) sin ""(A)/(2) `
` ( 2sqrt(bc))/( b+c) COT""(A)/(2) `
` ( 2sqrt(bc))/( b+c) TAN""(A)/(2) `

ANSWER :A


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