The diagram below shows snapshots of an oscillator at different times. What is the period of
the oscillation?
B
С
D
E
F
t=0.0 st=0.30 s t=0.45 s t=0.90 s t-1.35 s 1.80 s
+0.10 m
0
-0.10 m
(Unit = s)

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Explanation:

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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.