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

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

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[(1-tan^(2)30^(@))div(1+tan^(2)30^(@))]-sin30^(@)= A)-1 B)0 C)1 D)2

Prove that : (2tan^(2)30^(@))/(1-tan^(2)30^(@))+sec^(2)45^(@)-cot^(2)45^(@)=sec60^(@) .

If (2tan^(2)30^(@))/(1-tan^(2)30^(@))+sec^(2)45^(@)-sec^(2)0^(@)=xsec60^(@) , then the value of x is

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

The value of (3 tan 30^(@)-tan^(3)30^(@))/(1- 3 tan^(2)30^(@)) is _______

Value of (2 tan^(2) 60^(@))/(1 + tan^(2) 30^(@)) = _________.

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

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