You can put this solution on YOUR website! Prove the identity
(sin A - cos A)/(sin A) + (cos A - sin A)/(cos A) = 2 - sec A csc A
(1 - cot) + (1 - tan) = 2 - 1/(sin*cos)
2 - tan - cot = 2 - 1/(sin*cos)
tan + cot = 1/(sin*cos)
Multiply thru by sin*cos
sin^2 + cos^2 = 1
I'm convinced.