सिद्ध कीजिए कि
` (1-tanA)^(2) + (1 - cot A)^(2) = ( sec A - "cosec" A)^(2) .`

Explanation

` sin A = 12/13 , cos A = (-5)/13 , "cosec" A = 13/12 , sec A = (-13)/5 , cot A = (-5)/12 `