3sina-4sin4a/sin5a
if a=-45 degree

The graph shows the distance kerri drives on a trip. what is kerri's speed?

What is the surface area of the sphere?

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno nina made two errors in the proof. identify and correct the errors.