i am having trouble with two problems. 1) S(lower limit -2 upper limit -1) of (csc(2theta)-cot(2theta))^2 dtheta and 2) From Scscx dx=

-ln|cscx+cotx|+c Scscx dx= ln|cscx-cotx|+c show -ln|cscx+cotx|=

ln|cscx-cotx|+c ....................i don't know what it is about the cscx/cotx combo im having trouble with but id appreciate some help. Thanks