Question 1014378
This is identical to question 1013471 done a few days ago.


Apply the definitions and simplify from that.  You want to begin with everything in sines and cosines first before going through other steps.


ANSWER:  {{{highlight(sec(x)=-2)}}}



(The text to show the steps are difficult to type and then place here).
Note that you will find the need in one of the later steps that  from {{{cos^2(x)+sin^2(x)=1}}}, you will use  {{{sin^2(x)=-1*(cos^2(x)-1)}}}.


You may be able to manage your own good steps based on that.