# How do  I find sin y =-sqrt 2/2? I know that you use the given to find the angle but a 45-45-90 has sides of 1-1-sqrt2 and the 30-60-90 has 1-sqrt3-2     do I need to simplify the sqrt2/2?    Thank you :D

Question

How do  I find sin y =-sqrt 2/2? I know that you use the given to find the angle but a 45-45-90 has sides of 1-1-sqrt2 and the 30-60-90 has 1-sqrt3-2

do I need to simplify the sqrt2/2?

Thank you :D