Question 1203702
<pre>
{{{sin(-t) = sin(0-t)=sin(0)cos(t)-cos(0)sin(t) = 0*cos(t)-1*sin(t)=-sin(t)}}}
{{{-sin(t)= 6/7}}}
{{{sin(t)=-6/7}}}
{{{csc(t)=1/sin(t)=1^""/(-6/7)=-7/6}}}

Edwin</pre>