" (i) "cos^(2)30^(@)(1+tan^(2)30^(@))

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

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

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

Choose the correct option and justify your choice :(i)(2tan30^(@))/(1+tan^(2)30^(@))(a)sin60^(@)(b)cos60^(@)(c)tan60^(@)(d)sin30^(@)

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

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

Verify that cos 60^(@)=(1-tan^(2)30^(@))/(1+tan^(2)30^(@))