Question 845140
preform the following subtraction and simplify the result: 
sinx-1 cosx
------ - ------
cosx sinx-1 
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{{{(sinx-1)/cosx-cosx/(sinx-1)}}}
..
{{{(sin^2(x)-1-cos^2(x))/cosx(sinx-1)}}}
..
{{{(-cos^2(x)-cos^2(x))/cosx(sinx-1)}}}
..
{{{(-2cos^2(x))/cosx(sinx-1)}}}
..
{{{(-2cosx)/(sinx-1)}}}