1. The problem statement, all variables and given/known data A 22 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Find the oscillation frequency, if its displacement from the origin is given by x(t) = (22.0 cm)·cos((25.0 rad/s)t + π). 2. Relevant equations angular frequency=sqrt(k/m) period=2pisqrt(m/k) period=1/frequency 3. The attempt at a solution okay so from the equation they gave us i think the 22.0 cm (0.22m) is the amplitude of the oscillation, and 25.0 rad/s is the angular frequency, and the pi is the is the phase angle. So im trying to solve for oscillation frequency but im not sure how to start the problem. Any solid help with trying to start this problem would be appreciated, Thanks!