Question: Please solve it a IV. 1. Under matrix addition and multiplication C = b : a , bER a is a field. i. What is

Please solve it

a IV. 1. Under matrix addition and multiplication C = b : a , bER a is a field. i. What is cos 0 - sin 0 ? sind cos 0 0 ii. Show that D = : r ER ) is a subring of C. iii. Is D an ideal of C'

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