Mathematics, 20.09.2021 14:00, zacklofton6518

1. P = $\begin{pmatrix}-\sin \left(x\right)&\cos \left(x\right)\\ \cos \left(x\right)&\sin \left(x\right)\end{pmatrix}$ Q = $\begin{pmatrix}\sin \left(x\right)&\cos \left(x\right)\\ \cos \left(x\right)&-\sin \left(x\right)\end{pmatrix}$
and I is a 2×2 identity matrix. Find PQ +2I

2. P = $\begin{pmatrix}\cos \left(x\right)&-\sin \left(x\right)\\ \sin \left(x\right)&\cos \left(x\right)\end{pmatrix}$
Q = $\begin{pmatrix}\cos \left(x\right)&\sin \left(x\right)\\ -\sin \left(x\right)&\cos \left(x\right)\end{pmatrix}$
and I is a 2×2 identity matrix. Find PQ +2I

Answers: 2

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1. P = Q =
and I is a 2×2 identity matrix. Find PQ +2I

2. P =
Q =
...