hi, i need a little bit of help with questions such as:

use a unit circle diagram to find all angles between 0deg and 360deg:

sine 0.5

cos 1/root2

etc...

i can usually do this as i have a summary of angles of :

multiples of

90deg

45deg

30deg

i know what the x and y values are from these.. but when i find the angles i get confused on what angle sine is .. eg with root3/2 i dont know if the angle going anti clockwise is 30 or 60 unless i use my calculator..

i hope you guys understand what im talking about... as my teacher keeps mentioning the acute angle which i have no idea on where is is ??