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ConceptOperations on Matrices - Addition of Matrices

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#### Question

If A = `([cos alpha, sin alpha],[-sinalpha, cos alpha])` , find α satisfying 0 < α < `pi/r`when `A+A^T=sqrt2I_2` where A^{T} is transpose of A.

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#### Reference Material

Solution for concept: Operations on Matrices - Addition of Matrices. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), 12th HSC Arts, 12th HSC Arts, 12th HSC Science (Computer Science), 12th HSC Science (Computer Science), 12th HSC Science (Electronics), 12th HSC Science (Electronics), 12th HSC Science (General) , 12th HSC Science (General) , 12th ISC (Arts), 12th ISC (Commerce), 12th ISC (Science), PUC Karnataka Science