Pleas ehelp about convergent boundaries and don't spam I really need help on a few question PLZZZ

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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.

6 cos 34, 6 sin 34 trig