If tan , x and tan 5 are in A.P. an...
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If tan , x and tan 5 are in A.P. and tany and tan are also in A.P., then (A) x = y (B) x = 2y (C) 2x = y (D) x + y = 1/2

JEE/Engineering Exams
Maths
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( 2 x=tan frac{pi}{9}+tan left(frac{9 pi-4 pi}{18}right) ) ( 2 x=tan frac{pi}{9}+tan left(frac{pi}{2}-frac{2 pi}{9}right) ) ( 28 x=tan frac{pi}{9}+cot frac{2 pi}{9} ) ( 2 x=tan frac{pi}{9}+frac{1}{tan 2 pi / 9} ) ( 2 x=tan frac{pi}{9}+frac{1-tan ^{2} pi / 9}{2 tan pi / 9} ) ( frac{2 x=2 tan ^{2} frac{pi}{9}+1-tan ^{2} frac{pi}{9}}{2 tan pi} ) ( 2 x=frac{tan 2 pi / 9+1}{2 tan frac{pi}{9}} ) ( tan (1) operatorname{arct}(2) ) ( y=tan frac{pi}{9}+tan left(frac{9 pi-2 pi}{18}right) quad 1 x ) ( tan frac{pi}{9}+tan left(frac{pi}{2}-frac{pi}{9}right) ) ( 2 x= ) ( tan frac{pi}{a}+frac{1}{tan frac{pi}{a}} ) ( frac{tan ^{2} pi / a+1}{operatorname{gsan} pi / 9} ) ( left(tan ^{2} frac{pi}{9}+1right) / 2 tan pi / 9 )
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