If a chemical is spilled on the floor of a lab, what is the safest way to determine if it is an acid? a. determine if it dissolves metal b. taste a small amount c. inhale deeply d. use litmus paper

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.