(1-tan^(2)45)/(1+tan^(2)45)=

(1-tan^(2)45o)/(1+tan^(2)45o) is equal to tan90o(b)1(c)sin450(d)sin0o

Choose the correct option and justify your choice.:- (1-tan^2 45^@)/(1-tan 45^@)

(1 - tan^2 45^0)/(1 + tan^2 45^0)

Prove the following : (1-tan^2(45^@-A))/(1+tan^2(45^@-A)) = sin2A

(1-tan^(2)(45^(@)-A))/(1+tan^(2)(45^(@)-A)) is equal to

If the value of (1+tan 1^(@))(1+ tan 2^(@)) (1+tan 3^(@)) ……….(1+ tan 45) Is 2^(lambda) , then the sum of the digits of the number lambda is

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

(1-tan^(2)(45^(@)-theta))/(1+tan^(2)(45^(@)-theta))=