Question 1114968
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Using the pythagorean identity, you'll find that 
cos(A) = 4/5
sin(B) = -3/5
Note: Since B is in quadrant 4, the sine value here is negative


So,
sin(A-B) = sin(A)*cos(B)-cos(A)*sin(B)
sin(A-B) = (3/5)*(4/5) - (4/5)*(-3/5)
sin(A-B) = 12/25 + 12/25
sin(A-B) = <font color=red size=4>24/25</font>
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