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सरल कीजिए- `cos theta[(cos theta, sin theta),(-sin theta, cos theta)]+sin theta [(sin theta, -cos theta),(cos theta, sin theta)]` |
Answer» यहां `cos theta[(cos theta, sin theta),(-sin theta, cos theta)]+sin theta [(sin theta, -cos theta),(cos theta, sin theta)]` `=[(cos^(2)theta, cos theta sin theta),(-cos theta sin theta,cos^(2)theta)]` `+[(sin^(2) theta, -sin theta cos theta),(sin theta cos theta, sin^(2) theta)]` `=[(cos^(2) theta+sin^(2) theta, sin theta cos theta -sin theta cos theta),(-sin theta cos theta+sin theta cos theta,cos^(2) theta+sin^(2) theta)]` `=[(1,0),(0,1)]` |
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