Find the angle between u=(8, -3) and v=(-3,-8) Round to the nearest tenth of a degree

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Afootball is throw by a quarterback to a receiver

If sin(x) = 0 and cos(x) = 1, what is tan(x)?