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tan(45^(@)+A)tan(45^(@)-A)=1...

`tan(45^(@)+A)tan(45^(@)-A)=1`

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tan(45^(@)+ theta )*tan(45^(@)-theta)=

(tan(45^(@)+alpha)-tan(45^(@)-alpha))/(cot(45^(@)+alpha)-cot(45^(@)-alpha))=

tan225^(@)=tan(180^(@)+45^(@)) =tan45^(@)=1

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

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

The value of (1-tan^(2)45^(@))/(1+tan^(2)45^(@)) is

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

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