Whenver I try to put this into the calculator it says "invalid argument"
Plz help
The sine function has a range of -1 to 1; if you imagine the y=sinx graph, the y value at any point is always between -1 and 1. Sin^-1 337.5 is looking for a y value of 337.5, then reading off to the closest x value that has this y value. As no points on the graph have a y value of 337.5, there are no solutions for your problem and your calculator returns an error.
