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" (ii) "(1+tan^(2)(45^(@)-A))/(1-tan^(2)...

" (ii) "(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)) is equal to

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

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

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

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

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