Question: Same task as in Prob. 16 for the matrix in Prob. 7. Give an application of the matrix in Prob. 2 that makes the form

Same task as in Prob. 16 for the matrix in Prob. 7.

Give an application of the matrix in Prob. 2 that makes the form of the inverse obvious.

Data from Prob 2

Find the inverse by Gauss€“Jordan (or by (4*) if n = 2). Check by using (1).

sin 20 cos 20 cos 20 -sin 20

Data from Prob 7

Find the inverse by Gauss€“Jordan (or by (4*) if n = 2). Check by using (1).

Same task as in Prob. 16 for the matrix in 

sin 20 cos 20 cos 20 -sin 20

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