csc²x-4=0
I don't really know how to approach this question. I'm working ahead in my textbook and decided to give it a shot. All help is appreaciated :)
csc = 1/sin
csc^2 = 1/sin^2
1/ sin^2 = 4
sin^2 = 1/4
sin = +- 1/2 Got it from here?
arcsin (1/2) = 30 150
arcsin (-1/2) = 330 210 degrees
Sorry! (for the edits)