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[" Q.11.Let "A=[[0,-tan(alpha)/(2)],[tan...

[" Q.11.Let "A=[[0,-tan(alpha)/(2)],[tan(alpha)/(2),0]]" and I be "],[" the identity matrix of order "2." Show that "I],[+A=(I-A)[[cos alpha,-sin alpha],[sin alpha,cos alpha]]quad " (U."P.2018)]

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