for 66, I have done:
Common denominator
(Sec x - 1) - (sec x + 1)/ (Sec x - 1)(sec x + 1)
Where do I go on a problem like this? I am supposed to simplify them...I have done about 10 of these earlier today, but I am stuck on these last two...I know that there is probably more than one way to go on these, but I am having a hard time getting started
that is wrong. you were on the right track, but you messed up the signs
note that the denominator is the difference of two squares, thus we have:
now what?
continue the same way for the next problem. you don't have many options besides combining the fractions, follow your nose