Let's remind ourselves of what the sine graph looks like so that we can see how many solutions we should be expecting: Therefore, from the graph of the function, we can see that we should be expecting ...

Practise solving trigonometric equations in degrees or radians using CAST and its period to find other solutions within the range, including multiple or compound angles and the wave function.

Holy trinity of software. beware! Move over spreadsheet data base handler and word processor. Make room for the equation solver, the simulation/prediction program for those who live by the numbers.