Question

Trig: Exact Trig Values of Special Angles #15
http://www.kutasoftware.com/FreeWorksheets/Alg2Worksheets/Exact%20Trig%20Values%20of%20Special%20Angles.pdf

Answer 1

I obviously see the answer is negative radical 2. I understand that it is negative because of the location that reference angle is.

Answer 2

I think I may have figured it out but not sure if I am right in my logic.

Answer 3

I know the reference angle is 45 degrees.

Answer 4

45 degrees = \[\frac{ \sqrt{2} }{ 2 } \]