If A=[0−tanα2tanα20] and I is the identity matrix of order 2, show – InterviewSolution

1.	If A=[0−tanα2tanα20] and I is the identity matrix of order 2, show that I + A =(I−A)[cosα−sinαsinαcosα]
Answer» If $A = [\begin{matrix} 0 & - t a n \frac{α}{2} t a n \frac{α}{2} & 0 \end{matrix}]$ and I is the identity matrix of order 2, show that I + A $= (I - A) [\begin{matrix} c o s α & - s i n α s i n α & c o s α \end{matrix}]$

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