I have a couple of trig equations which i am having difficulty solving. I was sick for a while before the break and now that its exam review time I don't remember much. BTW this is an assignment due tomorrow, thats why its in urgent help.
Here are the questions
please note the cos x is not under the root
heres how i started solving the first equation =\
now im kinda stuck. since the question does not give a limit (ie 0 to 2pi) do we need to figure out an equation or something? =\
any help appreciated