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cos^(-1)(2tan30^(@))/(1+tan^(2)30^(@))=...

cos^(-1)(2tan30^(@))/(1+tan^(2)30^(@))=

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

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

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

(2 tan 30^(@))/( 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^(@))