If Sin A=9/41 and Cos B = 3/5, Find the value of Sin (A-B) and Cos(A+B)

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1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.