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प्रश्न
`cos theta [(cos theta, sin theta),(-sin theta, cos theta)] + sin theta [(sin theta, - cos theta),(cos theta, sin theta)]` = ______
पर्याय
`[(0, 0),(0, 0)]`
`[(0, 1),(1, 0)]`
`[(1, 0),(0, 0)]`
`[(1, 0),(0, 1)]`
उत्तर
`[(1, 0),(0, 1)]`
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