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(2tan30^(@))/(1-tan^(2)20^(@))=-sqrt(3)...

(2tan30^(@))/(1-tan^(2)20^(@))=-sqrt(3)

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(2tan30^(@))/(1-tan^(2)30^(@))

Prove that : tan(2 times 30^(@))=(2tan30^(@))/(1-tan^(2)30^(@))

Prove that : tan(2 times 30^(@))=(2tan30^(@))/(1-tan^(2)30^(@))

(2 tan 30^(@))/( 1-tan ^(2) 30^(@)) =

(2 tan 30^(@))/( 1-tan ^(2) 30^(@)) =