chapter 10 c2 question

not a specific question but a big bit in an excersise im not sure how to do

'solve the follwoing equations for x, in the intervals indicated

the first one is(when i know how to do one, i'll be set):

sin x degrees = -root3/2 , interval = 180 - 540 degrees

thanks

Imagine the graph y=sinx. It's at rt3/2 at 60 degrees, so it's at -rt3/2 at 180+60 and 360-60, i.e. At 240 and 300. It also has a period of 360 degrees, so add 360 onto both of those and include them if they fall in the range (they don't, the graph is positive between 360 and 540).

I really hope I haven't ballsed up here, I'd be quite ashamed if I did