Which sum or difference identity could be used to prove that sin(π + q) = -sin q is an identity?

Sat no calculator section question in the picture

Which object has the least amount of kinetic energy? a. a car driving down a road b. a soccer ball rolling down a hill c. a bicycle locked to a bike rack d. a satellite orbiting earth

At work claire has a deadline that is rapidly approaching as she works she finds that she is doing more work in a shorter amount of time than usual she thinks more quickly and her senses and memory are sharper what is responsible for claire working more efficiently