Question

in the displacement equation of simple harmonic
motion y = a sinot, dimension of o is
(1) [M°LºT]
(2) [MLT-2)
(3) [M°LºT-')
(4) (MºLT-')​

Answer 1

Answer is 3

now since sontheta where theta has no dimensions so ot should be dimensionless so dimensions of o are T-1