Sinx = 3/5
find tanx , and cos x, when x obtuse angle

However, if the workers do outside of what's normally expected, go ahead and tip.

Yes i also think it is b

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.