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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

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

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Q =
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