Prove the identity:
sin ((x))-(y)) / cos (x) sin (y) = tan (x) cot (y) - 1

Below.

Step-by-step explanation:

sin ((x))-(y)) / cos (x) sin (y)

    sin x cos y - cos x sin y

=  

           cos x sin y

     sin x cos y

=       -   1

     cos x sin y

But tan x = sin x / cos x  and cot y = cos y / sin y

So the above =  tan x cot y - 1.

it could 14.28 but if its not that one then it has to be the 17 one. hope this ! : )

step-by-step explanation: