Question 3545
{{{cosecX = (1/sinX)}}} and {{{cotX = (cosX/sinX)}}}, so:


{{{(1/sinX) - cosX((cosX/sinX))}}}


(1-cos^2X)/sinX


sin^2X/sinX --> this is why it says sinX is not zero, since if it was, we would have a "divide by zero" situation.


answer is therefore sinX


As for sin(x-pi)...what do you mean, what is the answer? You have not supplied an equation, so how can we help?


jon