Question 971778
Tal vez desee volver a una forma mas sencilla.?


Ponga los functiones a su mas sencilla y,....


{{{-(1/sin(x))(1/sin(x))(1/cos(x))+(cos(x)/sin(x))(1/cos(x))(sin(x)/cos(x))}}}


{{{-(1/(sin^2(x)cos(x)))+(cos(x)sin(x))/(sin(x)cos^2(x))}}}


{{{-(1/(sin^2(x)cos(x)))(cos(x)/cos(x))+((cos(x)sin(x))/(sin(x)cos^2(x)))(sin(x)/sin(x))}}}


{{{(-cos(x)+cos(x)sin^2(x))/(sin^2(x)cos^2(x))}}}


{{{(cos(x)sin^2(x)-cos(x))/(sin^2(x)cos^2(x))}}}


Vea un factor {{{1=cos(x)/cos(x)}}} para lo quite!  Entonces uno o dos pasos mas, y terminar.  Mas sencilla.