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In A B C , on the side B C ,D and E are...

In ` A B C ,` on the side `B C ,D and E` are two points such that `B D=D E=E Cdot` Also `/_A D E=/_A E D=alpha,` then (a) `3(tanB+tanc)=2tanalpha` (b) `tanB+tanC=3tanalpha` (c) `tanA=(6tanalpha)/(9-tan^2alpha)` (d) `tanA=(6tanalpha)/(tan^2alpha-9)`

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