Answer given in hints not accepted.

[tag]

Re unit_circle/radians/61
sin(−5π/2)=?

Moving to the correct point and entering "-1" in the answer box returned "The point is correct, but ...[something about the sine value]".

The correct answer (-1) was not recognized until after clicking through the hints. Did it require moving a full revolution (-2π), plus the extra (-π/2) without simplfying to simply -π/2? If so, that is confusing and unclear. (Simplification should be permitted or specifically called out as not permitted in the question.)