What is the average of first 34 multiples of 3.4?
First term = 3.4 x 1 = 3.4 Last term = 3.4 x 34 = 115.6 Required average = (3.4 + 115.6)/2 = 59.5
If sinA = 3/5 and cosB = 12/13, where A and B are in the first quadrant, find sin(A + B).
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