No. It is inaccurate to write a trinomial with a of degree 0.
Work Step by Step
When we name a polynomial we look at the highest degree term in the polynomial and if the highest degree is 0, this means that the polynomial will not be named a trinomial since a trinomial has three terms and the highest degree is three. Because "tri" represents three. Thus it is not correct to write a degree 0 as a trinomial.