Question 362285
1. sec x.  Multiply numerator and denominator of the 1st term by 1-sinx.  The denominator will give {{{cos^2(x)}}}.  Simplify and combine the two fractions.
2. csc x.  Convert everything in terms of sinx and cosx.  This will give a complex fraction.  combine fractions in the numerator, and do the same with the denominator.  Terms will readily cancel.
3. sin x.  Convert the cscx+ cotx as {{{1/sinx+1/tanx}}}, and combine.  Terms will readily cancel.  simplify.