1. To what degree should we bend our body in the Chair Pose?

2. At what degree should we bend our body in the Chair Pose?

3. From what degree should we bend our body in the Chair Pose?

- We should bend our body at a 45 degree angle.

(Which question is correct? Pay attention to the preposition, please?)

I'd use #2, not #1 or #3.

45-degree angle