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If S=[S(i j)] is a scalar matrix such th...

If `S=[S_(i j)]` is a scalar matrix such that `s_(i i)=ka n dA` is a square matrix of the same order, then `A S=S A=?` `A^k` (b) `k+A` (c) `k A` (d) `k S`

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RD SHARMA ENGLISH-ALGEBRA OF MATRICES-All Questions
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  12. If A=[costheta-sinthetasinthetacostheta] , then A^T+A=I2 , if theta=np...

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