If the numerator of a fraction is increased by 200% and the denominator is increased by 400%, the resultant fraction is 9/25 . What was the original fraction?
Let the origanl fraction be x/y. Acc. to question, => [x + 200x/100]/[(y + 400y/100)] = 9/25 => 300x/500y = 9/25 => x/y = 3/5
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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