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

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Tagged in
MathTrigonometry

Trigonometric Ratios