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=( Tan A + Tan A) / (1- Tan A.tan A)
= 2. Tan A /( 1- tan"A)
= 2.(3/4) / (1 -(3/4)")
= (3/2) / ( 7/16)
= (3/2) x (16/7)
= 24/7
= (2 (3/4)) / (1 - (3/4)^2)
= (3/2) / (1 - 9/16)
= (3/2) / (7/16)
= 3/2 . 16/7
= 24/7
= 3 3/7