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(1+tan^2 (45-A))/(1-tan^2 (45-A)) = cose...

`(1+tan^2 (45-A))/(1-tan^2 (45-A)) = cosec2A`

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(1 + tan ^ (2) (45-A)) / (1-tan ^ (2) (45-A)) = cos ec2A

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

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

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

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

(1 + tan ^ (2) (45 ^ (@) - A)) / (1-tan ^ (2) (45 ^ (@) - A)) = csc2A

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