Trig question

1. Mar 30, 2008

alpha01

find all solutions to sin^2 x = 1/4 in pi/2 <= x < 2pi (i.e in quadrants 2,3 and 4)

i understand what i need to do but dont understand sin^2 part. will i need to apply pythagoras therom here first?

thanks

2. Mar 30, 2008

Snazzy

$$\sin ^2x=(\sin x)^2$$

You can square root both sides, and finding x should be simple then.