The equation of a circle is given by $x^2+y^2=a^2$, where $a$ is the radius. If the equation is modified to change the origin other than $(0,0)$, then find out the correct dimensions of A and B in a new equation i $(x-A t)+\left(y-\frac{t}{B}\right)^2=a^2$. The dimensions oft is given as $\left[T^{-1}\right]$.