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[" 18.If "A=[[0,-tan(alpha)/(2)],[tan(al...

[" 18.If "A=[[0,-tan(alpha)/(2)],[tan(alpha)/(2),0]]" and "1" is the identity matrix of order "2" ,show the "],[qquad I+A=(I-A)[[cos alpha,-sin alpha],[sin alpha,cos alpha]]]

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If A=[[0, -tan (alpha/2)], [ tan (alpha/2), 0]] and I is the identity matrix of order 2 , show that I+A=(I-A)[[cos alpha, -sin alpha],[ sin alpha, cos alpha]]

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